A thin-type loudspeaker and a vehicle audio system. The loudspeaker comprises a support, a cone, a voice coil connected to the cone, and a magnetic driving assembly used for driving the voice coil to vibrate up and down. The cone comprises an outer cone and an inner cone; the outer cone has a first outer edge and a first inner edge; the first outer edge is higher than the first inner edge; the first outer edge is connected to the support; the inner cone has a second outer edge; the second outer edge is connected to the first inner edge; and the middle of the inner cone is arched upwards relative to the second outer edge. The thin-type loudspeaker reduces the heights of the cone and the support without reducing sound radiation surface of the cone, thereby reducing the overall height/thickness of the loudspeaker, and making the loudspeaker light and thin; and additionally, the radial size of the magnetic driving assembly does not need to be increased.
A loudspeaker and an automobile audio system. The loudspeaker comprises a basket, a cone, a spider, a voice coil used for driving the cone to vibrate, and a magnetic circuit unit used for driving the voice coil to move, wherein the cone is provided with a centrally upwardly protruding conical portion, and the magnetic circuit unit is arranged below the cone; the loudspeaker further comprises a spider fixing ring; the spider fixing ring is connected to the basket, and the outer edge of the conical portion is fixed to the basket and/or the spider fixing ring; the outer edge of the spider is fixed to the spider fixing ring, and the inner edge of the spider is fixed on the conical portion. According to the loudspeaker of the present disclosure, the power is improved without additionally increasing the height/thickness.
An audio device for a motorcycle and the motorcycle having same. The audio device for the motorcycle comprises a subwoofer unit, wherein the subwoofer unit comprises: an enclosure, which has a length direction extending in the front-rear direction of the motorcycle; and a bass sound-producing module, which is configured to be located in front of the seat of the motorcycle, wherein the bass sound-producing module comprises a basket, a vibration system, and a driving system, and the basket, the vibration system, and the driving system define a first chamber. A second chamber in the enclosure is provided for the bass sound-producing module, the basket is connected to the enclosure, and airflow channels used for communicating the first chamber with the second chamber are formed in the basket; and a sound radiation surface of the vibration system is configured to face the rear of the motorcycle.
An exciter and a vehicle audio system. The exciter comprises a frame, a diaphragm, a voice coil and a magnetic circuit assembly for driving the voice coil. The diaphragm and the magnetic circuit assembly are arranged on the frame. The exciter further comprises a positioning piece and a connecting member. The positioning piece is connected to the diaphragm. The upper end portion of the connecting member is connected to the positioning piece, and the lower end portion of the connecting member is connected to the magnetic circuit assembly. The present disclosure reduces the axial offset of the exciter during vibration. The exciter can output stable sound and has improved power.
An onboard speaker and an onboard speaker system. The onboard speaker comprises a basket and positioning assemblies for pre-fixing the basket onto a vehicle mounting plate, the positioning assemblies extending upward from an upper surface of the basket. Each positioning assembly comprises at least two positioning members that are elastically deformable and can be inserted into mounting holes on the vehicle mounting plate, wherein there is a gap between the at least two positioning members; and at least one of the positioning members is provided with an outward protruding portion, the protruding portion having a limiting surface facing the upper surface of the basket, thus restricting the vehicle mounting plate between the upper surface of the basket and the protruding portion. The onboard speaker achieves both the function of positioning and error prevention and the function of pre-installation, has a simple structure, and involves convenient operations, saving on time and labor.
A sound production device and a vehicle armrest box system. The sound production device comprises a frame (1), a first sound production unit (2), a second sound production unit (3) and a single magnetic conduction bowl (4), wherein the first sound production unit (2) comprises a first cone (21), a first voice coil (22), a first top plate (23) and first magnet (24); the second sound production unit (3) comprises a second cone (31), a second voice coil (32), a second top plate (33) and second magnet (34); the single magnetic conduction bowl (4) is provided with a first accommodating cavity (401) and a second accommodating cavity (402) which are arranged in a direction of the vibration axis; the first sound production unit (2) and the second sound production unit (3) are respectively located on opposite sides of the magnetic conduction bowl (4), the first top plate (23) and the first magnet (24) are arranged in the first accommodating cavity (401) and form a first magnetic gap (403) for allowing the other end of the first voice coil (22) to be inserted, and the second top plate (33) and the second magnet (34) are arranged in the second accommodating cavity (402) and form a second magnetic gap (404) for allowing the other end of the second voice coil (32) to be inserted. The sound production device can achieve the sound effect equivalent to two loudspeakers while reducing the size (height) in the direction of the vibration axis.
A loudspeaker and a method for assembling same. The method for assembling the loudspeaker comprises the follow steps: (1) connecting a positioning support piece (5) to a diaphragm (2) to form a pre-assembled component; and (2) mounting the pre-assembled component onto a basket (1). The positioning support piece (5) comprises an outer edge (51), an inner edge (53) and a corrugated main body (52) located between the outer edge (51) and the inner edge (53). In step (1), the outer edge (51) of the positioning support piece (5) is fixedly connected to a surround (23) of the diaphragm (2), and the inner edge (53) of the positioning support piece (5) is fixedly connected to the back surface of the diaphragm (2). The method for assembling the loudspeaker achieves convenient assembly, and the obtained loudspeaker has a small size in the height direction.
A sound device, and an acoustic vehicle alerting system having same. The sound device comprises a speaker and a protective cover arranged above the speaker, wherein the speaker is provided with a diaphragm which vibrates in a reciprocating manner along a vertically extending axis of motion. The protective cover is provided with a sound-transmitting grille, which directly faces the upper surface of the diaphragm and allows air flow to pass therethrough. The sound device further comprises a windproof ring, which is connected to the protective cover, is arranged around the sound-transmitting grille, and protrudes upward relative to the sound-transmitting grille. The sound device is adapted for use in an outdoor environment, has a relatively high sound pressure level, and is suitable for use in an acoustic vehicle alerting system.
A loudspeaker and a vehicle onboard sound system. The loudspeaker comprises a mount, a diaphragm, and a face plate. The diaphragm is provided with a suspension edge, a center portion, and an arched portion. The suspension edge is connected to the mount, the arched portion is located between the suspension edge and the center portion and arches upward, and the outer edge of the face plate is connected to the mount and covers the diaphragm. The middle of the face plate is provided with a connecting portion that is sunken downward. The connecting portion is located above the center portion, and the connecting portion and the center portion are fixed to each other. In the loudspeaker, diaphragm deviation is prevented. Further, loudspeaker assembly is simplified.
A tweeter and an automobile sound system. The tweeter comprises a frame, a diaphragm arranged on the frame, a voice coil connected to the diaphragm, and a magnetic circuit configured to drive the voice coil to vibrate along the center line of the voice coil, wherein the diaphragm comprises a body and a surround, the body extending along a plane, which is perpendicular to the center line of the voice coil, the body being composed of a flat sheet-shaped carbon material layer, and the surround connecting the body to the frame; and the voice coil is connected to the body. The tweeter has a small volume and wide directivity, also has a smooth frequency response curve in a high-frequency range and low distortion, and particularly offers relatively good listening experience and good sound quality.
A loudspeaker having double cones and an assembly method therefor, and a car audio system. The loudspeaker having double cones comprises: a basket, which is hollow and has a first end and a second end opposite to each other; a first cone, the outer edge of which is connected to the first end; a first voice coil, which is connected to the first cone; a first magnetic circuit, which is used for driving the first voice coil to reciprocate along a motion axis; a second cone, the outer edge of which is connected to the second end, wherein the second cone has a front surface and a back surface; a second voice coil, which is connected to the second cone; and a second magnetic circuit, which is used for driving the second voice coil to reciprocate along the motion axis, wherein the back surface of the first cone and the back surface of the second cone are arranged directly opposite to each other, the first magnetic circuit is arranged between the first cone and the second cone, the first magnetic circuit is connected to the basket, a mounting space is formed in the first magnetic circuit, and the second magnetic circuit is arranged in the mounting space of the first magnetic circuit. The loudspeaker achieves the function of a subwoofer without an additional cabinet, thus saving space.
A damper and a preparation method therefor, and an automobile loudspeaker. The damper of a loudspeaker comprises: an inner ring portion having an annular first inner edge and an annular first outer edge; and an outer ring portion having an annular second inner edge and an annular second outer edge, wherein the inner ring portion is made of cloth, and the outer ring portion is made of rubber; or, the inner ring portion is made of rubber, and the outer ring portion is made of cloth; the inner ring portion and the outer ring portion are respectively corrugated and are respectively provided with crests and troughs; and the first outer edge is fixedly connected to the second inner edge. The damper is conductive to enabling the loudspeaker to obtain a better frequency response curve and smaller distortion, especially a better frequency response curve and smaller distortion in a low-frequency band.
An in-vehicle outdoor speaker, comprising: a basin frame (1), a positioning support sheet (2), and a magnetic circuit (3). The basin frame (1) is provided with a magnetic circuit connecting part (11). The magnetic circuit (3) is disposed on the magnetic circuit connecting part (11). The in-vehicle outdoor speaker further comprises a stopper (4), a material of the stopper (4) is a buffer material so as to shrink and deform when subjected to an external force, and the stopper (4) is provided with an upper end portion facing the positioning support sheet (2) and a lower end portion facing the magnetic circuit (3) or the magnetic circuit connecting part (11). When the in-vehicle outdoor speaker is in a normal working state, a distance is provided between the stopper (4) and the positioning support sheet (2), or a distance is provided between the stopper (4) and the magnetic circuit (3) or the magnetic circuit connecting part (11), and when in an overload working state, the stopper (4) is pressed between the positioning support sheet (2) and the magnetic circuit (3) or the magnetic circuit connecting part (11). In the overload working state, the stopper (4) is pressed between the positioning support sheet (2) and the magnetic circuit (3) or the magnetic circuit connecting part (11), and the positioning support sheet (2) can be supported, to prevent a vibration system of the speaker from being irreversibly damaged due to excessive deformation.
Disclosed are a method and system for generating clock signal of I2S audio bus, and a dac circuit. The method includes: reading an audio file transmitted by the I2S audio bus, by a master controller; the master controller reading sampling rate, data bit length, and number of channels of the audio file, and, calculating data volume for each frame according to the data bit length and the number of channels, generating a master clock signal according to a multiplier requirement of a slave controller on the master clock signal, a frequency of the master clock signal being fs×X, wherein fs is the sampling rate, and X is a selected multiplier; and the slave controller receiving the master clock signal, and using the master clock signal as a clock source, to realize modulation and filtering for an audio digital-to-analog conversion.
A multi-magnetic-circuit loudspeaker and a vehicle audio system. The multi-magnetic-circuit loudspeaker comprises: a holder; a diaphragm, which is provided with an outer edge connected to an upper end portion of the holder; a plurality of voice coils, each of which has an upper end portion connected to the diaphragm; and a magnetic circuit mechanism, which is provided with a plurality of magnetic gaps, wherein each voice coil corresponds to one magnetic gap and is inserted into the corresponding magnetic gap; and the magnetic circuit mechanism comprises a magnetic conductive bowl connected to the holder, and a plurality of magnet assemblies arranged in the magnetic conductive bowl, the magnetic conductive bowl being provided with a plurality of accommodating channels, each of which is provided with one magnet assembly therein, the magnetic gap being formed between a side wall of each accommodating channel and an outer side surface of the magnet assembly located in the accommodating channel, and the magnetic conductive bowl being further provided with a communicating channel that is located between the plurality of accommodating channels and is in communication with the plurality of accommodating channels. The multi-magnetic-circuit loudspeaker has good heat dissipation performance, is convenient to assemble, has a small number of tooling, and has good structural stability.
Disclosed are a system and method for verifying a power amplifier of a vehicular audio system. The system includes: a TDM converter for converting an audio signal into a TDM signal; an audio signal processor for receiving the TDM signal and generating and outputting a test signal for transmitting to the power amplifier, the audio signal processor having N audio channels, N>1; a channel configurator having M configuration units, M≥N, each of the audio channels corresponding to one of the configuration units, and each of the configuration units having a selected state and a non-selected state; and a controller for determining that each of the configuration units is in the selected state or non-selected state and controlling the audio signal processor to place the TDM signal in audio channel(s) corresponding to configuration unit(s) in the selected state.
H03F 3/21 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C comportant uniquement des dispositifs à semi-conducteurs
H04S 7/00 - Dispositions pour l'indicationDispositions pour la commande, p. ex. pour la commande de l'équilibrage
Disclosed is a dual-cone loudspeaker, including: a frame; a cone assembly arranged on the frame and including a central cone and an outer cone; a central drive mechanism for driving the central cone to vibrate; and a plurality of outer driving mechanisms for driving the outer cone to vibrate. The outer driving mechanisms are arranged around the central drive mechanism. The central drive mechanism includes a central voice coil connected to the central cone, and a central magnetic driving system for driving the central voice coil. Each of the plurality of outer driving mechanisms comprises an outer voice coil connected to the outer cone, an outer damper sleeved on the outer voice coil, and an outer magnetic driving system for driving the outer voice coil.
Disclosed is a dual-cone loudspeaker, including: a frame; a cone assembly arranged on the frame and including a central cone and an outer cone; a central driving mechanism for driving the central cone to vibrate; and a plurality of outer driving mechanisms for driving the outer cone to vibrate. The outer driving mechanisms are arranged around the central driving mechanism. The central driving mechanism includes a central voice coil connected to the central cone, and a central magnetic driving system for driving the central voice coil. Each of the plurality of outer driving mechanisms includes an outer voice coil connected to the outer cone, and an outer magnetic driving system for driving the outer voice coil.
H04R 1/24 - Combinaisons structurelles de transducteurs séparés ou de parties du même transducteur et sensibles respectivement à plusieurs bandes de fréquences
H04R 1/06 - Aménagements des branchements de circuitsRéduction des efforts sur les branchements de circuits
A multi-input-driving loudspeaker including a frame, a diaphragm arranged on the frame, and a plurality of input driving mechanisms. Each input driving mechanism includes a voice coil and a magnetic circuit assembly for driving the voice coil to vibrate. A plurality of magnetic circuit mounting holes are arranged on the frame. A plurality of voice coil mounting holes are arranged on the diaphragm. Each of the input driving mechanisms further includes a damper. Each of the voice coils is sleeved with one of the dampers. The frame has a plurality of flanges surrounding the magnetic circuit mounting holes. Each of the dampers and each of the flanges cooperate with each other so that each damper is embedded between an inner walls of the flange corresponding therewith.
Disclosed are a vehicle having a device for reproducing sound and a vehicle center console. The vehicle includes a device for reproducing sound by loudspeakers, including a single enclosure being installed in the center console of the vehicle. The enclosure includes two opposite ends and, internally, a pair of loudspeakers. The two loudspeakers are arranged face to face or back to back at the two opposite ends of the enclosure. The device for reproducing sound is installed in the front median space between the driver seat and the front passenger seat, and the two front side walls of the passenger compartment do not include a sound reproduction element for the low-frequency spectrum.
H04R 1/22 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique de fréquence désirée uniquement
B60R 11/02 - Autres aménagements pour tenir ou monter des objets pour postes radio, de télévision, téléphones, ou objets similairesDisposition de leur commande
H04R 1/02 - BoîtiersMeublesMontages à l'intérieur de ceux-ci
H04R 1/28 - Supports de transducteurs ou enceintes conçus pour réponse de fréquence spécifiqueEnceintes de transducteurs modifiées au moyen d'impédances mécaniques ou acoustiques, p. ex. résonateur, moyen d'amortissement
H04R 5/02 - Dispositions spatiales ou structurelles de haut-parleurs
H04S 3/00 - Systèmes utilisant plus de deux canaux, p. ex. systèmes quadriphoniques
H04S 7/00 - Dispositions pour l'indicationDispositions pour la commande, p. ex. pour la commande de l'équilibrage
21.
METHOD FOR DETERMINING MOUNTING POSITION OF SPEAKER
A method for determining a mounting position of a speaker. The method comprises: calculating a transmission force of a vibration system of a speaker, presetting a mounting position of the speaker on a speaker mounting plate, and establishing a finite element model that applies the transmission force to the mounting position of the speaker mounting plate, performing simulation and calculation to obtain a deformation condition of the speaker mounting plate, and according to the deformation condition, determining whether the preset mounting position of the speaker on the speaker mounting plate is appropriate, wherein the transmission force is calculated according to a vibration displacement, a vibration velocity amplitude, a vibration acceleration amplitude, damping, a mass, and a stiffness coefficient of the vibration system of the speaker. According to the method for determining a mounting position of a speaker, an appropriate mounting position of the speaker can be determined on the speaker mounting plate, so that blindly enhancing the strength of the speaker mounting plate is avoided.
A sound-producing assembly, and a digital loudspeaker system and a control method therefor. The digital loudspeaker system comprises: N sound-producing assemblies, wherein N is greater than or equal to 2; a mounting seat, which has a plurality of mounting grooves, wherein at most one sound-producing assembly is arranged in each mounting groove; and a digital audio signal input PCB, which is used for accessing a sound source signal and converting same into a digital signal capable of driving the sound-producing assemblies to make sounds. Each sound-producing assembly comprises a support, a magnetic circuit system arranged in the support, a sound-producing diaphragm connected to the support, and a voice coil connected to the sound-producing diaphragm, wherein the magnetic circuit system has a magnetic gap, part of the voice coil is inserted into the magnetic gap, and an inner cavity is formed between the sound-producing diaphragm and the magnetic circuit system; and an airflow channel is formed between the inner surface of the support of each sound-producing assembly and the outer surface of the magnetic circuit system, the mounting seat further has an airflow cavity, and each inner cavity is in communication with the airflow cavity by means of a corresponding airflow channel. The digital loudspeaker system can realize pure digital input driving, and improves the bass effect.
An automobile pedestrian warning apparatus, comprising a mounting seat (1), a diaphragm (2), a voice coil (3), a magnetic circuit system (4) and a panel (6). The upper end portion of the voice coil (3) is connected to the diaphragm (2); the magnetic circuit system (4) is arranged in the lower portion of the mounting seat (1); the magnetic circuit system (4) is provided with a magnetic gap (40), and the lower portion of the voice coil (3) is inserted into the magnetic gap (40); the panel (6) is connected to the mounting seat (1) and covers the diaphragm (2); and the diaphragm (2) comprises a central portion (21), a cone-shaped portion (22) surrounding the central portion (21), and a corrugated ring portion (23) surrounding the cone-shaped portion (22); the central portion (21), the cone-shaped portion (22) and the corrugated ring portion (23) are integrally provided, the upper end portion of the voice coil (3) is connected to the cone-shaped portion (22), the central portion (21) covers above the voice coil (3), and the corrugated ring portion (23) is connected to the upper end portion of the mounting seat (1). The apparatus has a high sound pressure level and can emit vehicle hooting warning sound.
Discloses are a vehicle-mounted sound system, an open-circuit detection circuit and an open-circuit detection method for a loudspeaker thereof. The vehicle-mounted sound system includes an open-circuit detection circuit including a switching circuit, the switching circuit is connected between an output port of a control module of a power amplifier and a first connecting port so as to be controlled by a control signal from an output port to conduct or cut off the output port and the first connecting port. The second connecting port is electrically connected to a node for accessing a voltage together with an input port of the control module. The control module is configured for enabling the open-circuit detection circuit though the output port to determine whether the loudspeaker is in an open-circuit state according to a signal received by the input port.
An on-board bass shaker and an automobile audio system. The on-board bass shaker comprises a bracket, a voice coil, and a magnetic circuit system. The magnetic circuit system is provided with a magnetic gap, the upper end part of the voice coil is inserted into the magnetic gap, and the lower end part of the voice coil is connected to the bracket. The on-board bass shaker further comprises a first positioning support piece and a second positioning support piece. The first positioning support piece and the second positioning support piece each comprise an outer connecting edge, an inner connecting edge, and a main body connected between the outer connecting edge and the inner connecting edge. The main body is made of fabric. The outer connecting edge of the first positioning support piece is connected to the top of the bracket, and the inner connecting edge of the first positioning support piece is connected to the upper part of the magnetic circuit system. The second positioning support piece is located below the first positioning support piece, the outer connecting edge of the second positioning support piece is connected to the lower part of the bracket, and the inner connecting edge of the second positioning support piece is connected to the lower part of the magnetic circuit system. The resonance frequency of the on-board bass shaker in the present disclosure is low at low frequencies, facilitating creating a good 4D effect in a vehicle.
Discloses are a loudspeaker and an audio system. The loudspeaker includes a frame, a diaphragm for vibrating to produce sound and arranged on the frame, a voice coil for driving the diaphragm to vibrate, a magnetic circuit for driving the voice coil to vibrate, and an annular member arranged at an upper end portion of the voice coil and connected to the diaphragm. The magnetic circuit is arranged on the frame, and the magnetic circuit is provided with a magnetic gap for a lower end portion of the voice coil to insert in. The loudspeaker can achieve more prominent low frequency at a low cost during working, without overlap of frequency response when working together with a tweeter.
H04R 1/24 - Combinaisons structurelles de transducteurs séparés ou de parties du même transducteur et sensibles respectivement à plusieurs bandes de fréquences
H04R 1/02 - BoîtiersMeublesMontages à l'intérieur de ceux-ci
Disclosed is a multi-cone small loudspeaker, including a cone assembly. The cone assembly includes a central cone and a plurality of outer cones, and the plurality of outer cones are successively arranged in a circumferential direction of the central cone. The central cone is driven by a central driving mechanism to vibrate and sound, each of the plurality of outer cones is respectively driven by one outer driving mechanism to vibrate and sound. The central driving mechanism includes a central voice coil connected to the central cone, and a central magnetic driving system for driving the central voice coil. Each outer driving mechanism includes an outer voice coil connected to one of the plurality of corresponding outer cones, and an outer magnetic driving system for driving the outer voice coil.
An automobile loudspeaker and a sound system. The automobile loudspeaker comprises a basin frame, a vibrating diaphragm, a voice coil, and a magnetic circuit system having a magnetic gap. The outer edge of the vibrating diaphragm is connected to the basin frame. An upper end portion of the voice coil is connected to a middle portion of the vibrating diaphragm, and a lower end part of the voice coil is inserted into the magnetic gap. The magnetic circuit system is arranged on the basin frame. The automobile loudspeaker further comprises two independent dampers that are spaced at intervals. The two dampers are respectively located on two opposite sides of the voice coil. A portion of an edge of each damper is connected to the basin frame. The vibrating diaphragm has two first connecting parts which are sunken downwards, and the first connecting parts are connected to the dampers. The automobile loudspeaker of the present invention not only has the advantages of being lightweight and small in size, but also has the advantage of being able to ensure high power and a good low-frequency lower limit.
Disclosed in the present invention are a loudspeaker cone and a loudspeaker. The loudspeaker cone has an edge for connecting to a basket; the middle of the cone is provided with a cone middle hole for connecting to a voice coil; the cone has a pair of long edges and a pair of short edges; and the cone has a plurality of reinforcement portions, which are arched upwards or recessed downwards, the plurality of reinforcement portions respectively being located on two opposite sides of the cone middle hole and being symmetrically arranged. The loudspeaker cone of the present invention can effectively reduce loudspeaker distortion.
A flip-chip loudspeaker and a vehicle audio system. The flip-chip loudspeaker comprises a basket; a cone, which is provided with an outer end and an inner end which are opposite and open, wherein the basket covers the outer end of the cone, and the outer end is connected to the basket; a voice coil, which is connected to the inner end of the cone; and a magnetic circuit system, which is configured to drive the voice coil to vibrate, wherein the magnetic circuit system is arranged on the basket, the magnetic circuit system is provided with a magnetic gap, and part of the voice coil is inserted into the magnetic gap. The flip-chip loudspeaker further comprises a spider, which is arranged between the basket and the cone, wherein an outer edge of the spider is connected to the cone. The flip-chip loudspeaker of the present invention has a small overall height, occupies a small space, and is suitable for being used as a door panel loudspeaker.
The present disclosure relates to a vehicle-mounted woofer device and a design method therefor. The vehicle-mounted woofer device comprises a box body and a woofer disposed in the box body. The woofer comprises a cone. The cone has a front surface facing the interior of a cabin and a rear surface opposite to the front surface. A cavity is formed between the rear surface of the cone and the box body. A main waveguide for communicating the cavity with the outside is disposed in the box body. A secondary waveguide is further disposed in the box body. The main waveguide and the secondary waveguide are each provided with an inlet in communication with the cavity. The main waveguide is provided with an outlet for communicating with the outside of the cabin, and the secondary waveguide is provided with an outlet for communicating with the outside or inside of the cabin. The woofer device of the present disclosure has high sensitivity and relatively obvious low-frequency expansion, and improves the sound pressure level at low frequencies. According to the design method of the present disclosure, more parameters can be adjusted and controlled, and the degree of freedom is greater.
A coaxial loudspeaker with a horn and a shape optimization method therefor are provided. The coaxial loudspeaker includes: a woofer unit; a tweeter unit; and a horn having an inner cavity, an open upper end and an open lower end. The tweeter unit comprises a high-pitch cone, the horn surrounds the high-pitch cone, a lower end portion of the horn is connected to the tweeter unit, and an upper end portion of the horn has the largest inner diameter.
H04R 1/30 - Combinaisons de transducteurs avec des pavillons, p. ex. avec des moyens d'équilibrage mécanique
H04R 1/24 - Combinaisons structurelles de transducteurs séparés ou de parties du même transducteur et sensibles respectivement à plusieurs bandes de fréquences
33.
VEHICLE-MOUNTED AUDIO DEVICE AND WOOFER GROUP THEREOF
A vehicle-mounted audio device, comprising a tweeter group and a woofer group. The woofer group is configured to be arranged in an armrest box of a vehicle, and comprises a box body and at least two woofers, wherein an inner cavity is formed in the box body; the box body is provided with at least two mounting holes communicating with the inner cavity; and one woofer is mounted in each mounting hole. In the present invention, the woofers of the vehicle-mounted audio device are relatively few in terms of quantity, such that the weight is reduced and the space occupied thereby is saved on.
B60R 11/02 - Autres aménagements pour tenir ou monter des objets pour postes radio, de télévision, téléphones, ou objets similairesDisposition de leur commande
H04R 9/02 - Transducteurs du type à bobine mobile, à lame mobile ou à fil mobile Détails
Disclosed is a multi-cone loudspeaker, including a cone assembly. The a cone assembly includes a central cone and a plurality of outer cones successively arranged in a circumferential direction of the central cone. The central cone is driven by a central driving mechanism to vibrate and sound, each of the plurality of outer cones is driven by one of outer driving mechanism to vibrate and sound. The central driving mechanism includes a central voice coil connected to the central cone, and a central magnetic driving system for driving the central voice coil, and each of the plurality of outer driving mechanism includes an outer voice coil connected to one of the plurality of outer cones, an outer damper sleeved on the outer voice coil, and an outer magnetic driving system for driving the outer voice coil.
A clock generation method used for an I2S audio bus, a system, and a DAC circuit. The clock generation method used for an I2S audio bus comprises the following steps: the master controller reads an audio file transmitted by the I2sss is the sampling rate, and X is the selected multiplier; the slave controller receives the main clock signal, and uses the main clock signal as a clock source, to realize modulation and filtering for an audio digital-to-analog conversion. According to the invention, external special frequency crystal oscillators are not required, the design of the hardware circuit is simplified, and the device cost is reduced.
A loudspeaker system, having a good low-frequency response without a large box and effectively improving the efficiency of the loudspeaker system, so as to increase the output sound pressure level of the system, comprises a box and a plurality of loudspeakers arranged in the box and connected in parallel with each other, wherein each of the loudspeakers comprises a frame, a diaphragm arranged on the frame, and a voice coil for driving a vibration of the diaphragm; front surfaces of the diaphragms of the loudspeakers are arranged to face each other; a sound cavity is formed among the front surfaces of the diaphragms, and the sound cavity is in communication with the outside of the box; and each of the frames is located between a rear surface of its corresponding diaphragm and an inner wall of the box.
H04R 1/28 - Supports de transducteurs ou enceintes conçus pour réponse de fréquence spécifiqueEnceintes de transducteurs modifiées au moyen d'impédances mécaniques ou acoustiques, p. ex. résonateur, moyen d'amortissement
H04R 7/18 - Dispositions pour monter ou pour tendre des membranes ou des cônes à la périphérie
H04R 1/02 - BoîtiersMeublesMontages à l'intérieur de ceux-ci
H04R 1/40 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement en combinant plusieurs transducteurs identiques
37.
LOUDSPEAKER FRAME, LOUDSPEAKER AND MOUNTING SIMULATION ANALYSIS METHOD THEREFOR
Disclosure is a loudspeaker frame, comprising a frame body, and a fastener for mounting the frame body in an application scenario. The fastener comprises a connecting column having a proximal end being directly or indirectly connected to the frame body and a distal end; and fins arranged in pairs and respectively located on two sides of the connecting column, wherein each of the fins has a proximal end and a distal end. The distal end of each of the fins is connected to the distal end of the connecting column, a gap is formed between the proximal end of each of the fins and the connecting column, and each of the fins has elasticity so as to allow the fin to draw close to the connecting column after being pressed.
G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
H04R 1/02 - BoîtiersMeublesMontages à l'intérieur de ceux-ci
38.
SYSTEM AND METHOD FOR VERIFYING POWER AMPLIFIER OF ON-BOARD AUDIO SYSTEM
Disclosed are a system and method for verifying a power amplifier of an on-board audio system. The system for verifying a power amplifier of an on-board audio system comprises: a TDM converter for converting audio signals into TDM signals; an audio signal processor for receiving the TDM signals and generating and outputting test signals for feeding to the power amplifier, the audio signal processor having N audio channels, and N>1; a channel configurator, which has M configuration units, M≥N, the audio signals each corresponding to one of the configuration units, and the configuration units each having a selected state and a non-selected state; and a controller for determining whether each configuration unit is in the selected state or non-selected state and controlling the audio signal processor to place the TDM signals in the audio channels corresponding to the configuration units in the selected state. The present invention can simply and quickly verify the function and performance of the power amplifier for use in the on-board audio system.
A vehicle-mounted sound system and an open circuit detection method for a loudspeaker thereof. The vehicle-mounted sound system comprises: a power amplifier, which is used for driving a vehicle-mounted loudspeaker electrically connected to the power amplifier; a control module, which is used for controlling the power amplifier and is provided with an output port and an input port; and an open circuit detection circuit, which is provided with a first connecting port and a second connecting port which are electrically connected to two groups of leads of the loudspeaker respectively. The open circuit detection circuit further comprises a switching circuit, and the switching circuit is connected between the output port of the control module and the first connecting port so as to be controlled by a control signal from the output port to then connect or disconnect the output port and the first connecting port. The input port and the second connecting port of the control module are respectively electrically connected to a node, and the node accesses a voltage. The control module is used for enabling the open circuit detection circuit by means of the output port to determine whether the loudspeaker is in an open circuit state according to a signal received by the input port. According to the present invention, the loudspeaker may undergo open circuit detection at a relatively low cost.
A multi-input-driving loudspeaker including a frame, a diaphragm arranged on the frame, and a plurality of input driving mechanisms. Each input driving mechanism includes a voice coil and a magnetic circuit assembly for driving the voice coil to vibrate. A plurality of magnetic circuit mounting holes are arranged on the frame. A plurality of voice coil mounting holes are arranged on the diaphragm. Each of the input driving mechanisms further includes a damper. Each of the voice coils is sleeved with one of the dampers. The frame has a plurality of flanges surrounding the magnetic circuit mounting holes. Each of the dampers and each of the flanges cooperate with each other so that each damper is embedded between an inner walls of the flange corresponding therewith.
The present disclosure relates to a magnetic circuit of a loudspeaker and a loudspeaker, which can improve the non-linearity of magnetic permeability, thereby reducing the distortion of the loudspeaker. A magnetic circuit comprises a T-yoke with a base and a columnar portion protruding upward from the base, a magnetic steel arranged on the base, and a front sheet arranged on the magnetic steel, wherein the magnetic steel and the front sheet are arranged around a periphery of the columnar portion, and a short-circuit ring is arranged on an inner side of the magnetic steel and/or the front sheet. A first short-circuit ring is provided between the inner wall of the magnetic steel and the outer wall of the columnar portion, and a second short-circuit ring is provided on the inner wall of the front sheet.
Designed are a loudspeaker and an audio system. The loudspeaker comprises: a basket; a diaphragm used for vibrating and sounding, the diaphragm being arranged on the basket; a voice coil used for driving the diaphragm to vibrate; and a magnetic circuit system used for driving the voice coil to vibrate, the magnetic circuit system being arranged on the basket, and the magnetic circuit system being provided with a magnetic gap for insertion of the lower end of the voice coil. The loudspeaker further comprises an annular member, which is arranged at the upper end part of the voice coil and is connected to the diaphragm. The present disclosure can achieve at a low cost the more prominent low frequency during working, and does not superpose the frequency response when working together with a high-pitch loudspeaker.
H04R 9/02 - Transducteurs du type à bobine mobile, à lame mobile ou à fil mobile Détails
H04R 7/00 - Membranes pour transducteurs électromécaniquesCônes
H04R 1/24 - Combinaisons structurelles de transducteurs séparés ou de parties du même transducteur et sensibles respectivement à plusieurs bandes de fréquences
H04R 1/40 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement en combinant plusieurs transducteurs identiques
43.
IN-VEHICLE PANORAMIC SOUND DEVICE AND AUTOMOBILE LOUDSPEAKER SYSTEM
The present invention designs an in-vehicle panoramic sound device and an automobile loudspeaker system. The in-vehicle panoramic sound device comprises a sound production apparatus, the sound production apparatus comprising vehicle door loudspeaker groups, and each vehicle door corresponding to at least one of the vehicle door loudspeaker groups; a center loudspeaker provided at an instrument panel on the front side of an automobile; surround loudspeakers provided on the rear side of rear seats so as to correspond to the ears of people seated on the rear seats; a subwoofer provided on a trunk of a vehicle; and exciters provided on a ceiling above the seats, each seat corresponding to at least one of the exciters and the like. The panoramic sound device and the automobile loudspeaker system of the present invention omnidirectionally cover the space in the vehicle, and can generate a high-quality panoramic sound effect.
B60R 11/02 - Autres aménagements pour tenir ou monter des objets pour postes radio, de télévision, téléphones, ou objets similairesDisposition de leur commande
44.
COAXIAL LOUDSPEAKER WITH HORN AND SHAPE OPTIMIZATION METHOD THEREFOR
A coaxial loudspeaker with a horn and a shape optimization method therefor. The coaxial loudspeaker comprises a woofer unit, a tweeter unit, and a horn, which has an inner cavity and open upper and lower ends, wherein the tweeter unit comprises a high-pitch cone frame; and the horn surrounds the high-pitch cone frame, the lower end portion of the horn is connected to the tweeter unit, and the upper end portion of the horn is where the inner diameter of the horn is the largest. The shape optimization method comprises the following steps: S1, establishing a geometric model of a coaxial loudspeaker, and obtaining a control node in a contour curve of a horn; S2, providing a physical field; S3, defining material parameters; S4, performing grid division; S5, optimizing geometric parameters of a contour shape of the horn; and S6, drawing an optimized geometric model of the horn according to the optimized parameters. By means of the shape optimization method, a tweeter unit can have a better frequency response curve when working; and the shape of a horn can be quickly and accurately optimized, such that the acoustic performance of a loudspeaker is improved.
H04R 1/40 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement en combinant plusieurs transducteurs identiques
A mid-range loudspeaker, including a frame, a diaphragm arranged on the frame, a magnetic circuit system arranged on the frame, and a voice coil connected to the diaphragm. The diaphragm includes a honeycomb plate having a front surface and a back surface. Covering films respectively cover the front surface and the back surface of the honeycomb plate. The honeycomb plate is provided with a plurality of holes.
The present disclosure relates to a multi-cone small speaker without a positioning support piece. The speaker sound playback clarity is improved, the speaker bass and the directivity width is good, and the speaker has high sensitivity and small distortion. The multi-cone speaker comprises a cone frame and a cone assembly arranged on said cone frame. The cone assembly comprises a center cone and outer cones. The present small speaker also comprises a center drive mechanism for driving the center cone to vibrate, and multiple outer drive mechanisms for driving the outer cones to vibrate. The outer drive mechanisms are arranged at the periphery of the center drive mechanism. The center drive mechanism comprises a center sound coil connected to the center cone, and a center magnetic circuit system for driving the center sound coil. Each outer drive mechanism respectively comprises an outer sound coil connected to the corresponding outer cone, and an outer magnetic circuit system for driving the outer sound coil.
The present disclosure relates to a multi-cone speaker. The speaker sound playback clarity is improved, and the speaker has higher sensitivity. The present multi-cone speaker comprises a cone frame and a cone assembly arranged on said cone frame. The cone assembly comprises a center cone and multiple outer cones. The multiple outer cones are sequentially arranged in the circumferential direction of the center cone. The speaker also comprises a center drive mechanism, and multiple outer drive mechanisms arranged around the periphery of the center drive mechanism. The center cone is driven by the center drive mechanism to vibrate for sound. Each outer cone is driven by an outer drive mechanism to vibrate for sound. The center drive mechanism comprises a center sound coil connected to the center cone, and a center magnetic circuit system for driving the center sound coil. Each outer drive mechanism comprises an outer sound coil connected to the corresponding outer cone, and an outer positioning support piece sleeved on the corresponding outer sound coil, and an outer magnetic circuit system for driving the outer sound coil.
The present disclosure relates to a dual-cone small speaker without a positioning support piece. The speaker sound playback clarity is improved, the speaker bass and the directivity width is good, and the speaker has high sensitivity and small distortion. The dual-cone small speaker comprises a cone frame and a cone assembly arranged on said cone frame. The cone assembly comprises a center cone and an outer cone. The present small speaker also comprises a center drive mechanism for driving the center cone to vibrate, and multiple outer drive mechanisms for driving the outer cone to vibrate. The outer drive mechanisms are arranged at the periphery of the center drive mechanism. The center drive mechanism comprises a center sound coil connected to the center cone, and a center magnetic circuit system for driving the center sound coil. Each outer drive mechanism respectively comprises an outer sound coil connected to the corresponding outer cone, and an outer magnetic circuit system for driving the outer sound coil.
The present disclosure relates to a dual-cone speaker. The speaker sound playback clarity is improved, and the speaker has higher sensitivity. The present speaker comprises a cone frame and a cone assembly arranged on said cone frame. The cone assembly comprises a center cone and an outer cone. The speaker also comprises a center drive mechanism for driving the center cone to vibrate, and multiple outer drive mechanisms for driving the outer cone to vibrate. The outer drive mechanisms are arranged at the periphery of the center drive mechanism. The center drive mechanism comprises a center sound coil connected to the center cone, and a center magnetic circuit system for driving the center sound coil. Each outer drive mechanism respectively comprises an outer sound coil connected to the corresponding outer cone, an outer positioning support piece sleeved on the outer sound coil, and an outer magnetic circuit system for driving the outer sound coil.
The present disclosure relates to a vehicle-mounted woofer device and a design method therefor. The vehicle-mounted woofer device comprises a box body and a woofer disposed in the box body. The woofer comprises a cone. The cone has a front surface facing the interior of a cabin and a rear surface opposite to the front surface. A cavity is formed between the rear surface of the cone and the box body. A main waveguide for communicating the cavity with the outside is disposed in the box body. A secondary waveguide is further disposed in the box body. The main waveguide and the secondary waveguide are each provided with an inlet in communication with the cavity. The main waveguide is provided with an outlet for communicating with the outside of the cabin, and the secondary waveguide is provided with an outlet for communicating with the outside or inside of the cabin. The woofer device of the present disclosure has high sensitivity and relatively obvious low-frequency expansion, and improves the sound pressure level at low frequencies. According to the design method of the present disclosure, more parameters can be adjusted and controlled, and the degree of freedom is greater.
Disclosed in the present invention are a tweeter and an automobile audio system. The tweeter comprises: a bracket; a diaphragm arranged on the bracket, the diaphragm comprising a top part and a folding ring around the top part; a magnetic system arranged on the bracket and having a gap for inserting a voice coil; a voice coil, the upper end thereof being connected to the top part of the diaphragm or the edge of the folding ring next to the top part, and the lower end thereof being inserted into the gap; a first cavity is formed between the top part of the diaphragm, the inner side wall of the voice coil, and the magnetic system; the bracket is hollow to accommodate the magnetic system, and the bracket has an annular inner side edge and an annular outer side edge, the inner side edge being lower than the outer side edge, the folding ring of the diaphragm being secured to the outer side edge of the bracket, the magnetic system being secured to the inner side edge of the bracket, and a second cavity being formed between the folding ring of the diaphragm, the outer wall of the voice coil, and the bracket; one or a plurality of through holes are disposed on the voice coil, and the first cavity is in communication with the second cavity by means of the through holes. The present invention ensures that the size of the tweeter is small and assembly easy whilst widening the starting frequency of the tweeter.
A pedestrian warning device, comprising a warning device body having a cavity and an open end portion, and a sound-generating device mounted inside the cavity, wherein the pedestrian warning device further comprises a grille cover arranged on the end portion of the warning device body; the grille cover comprises at least two grille layers spaced at intervals from the inside to the outside, each of the grille layers comprising a plurality of crossbeams, the crossbeams being arranged at intervals so as to form gaps to enable gas to flow between adjacent crossbeams, and wherein a width of the gaps is not greater than a width of the crossbeams, and the crossbeams of adjacent grille layers are interleaved with each other. The grille cover can protect internal component of the pedestrian warning device and will not affect the performance of the pedestrian warning device.
Disclosed are a loudspeaker basket (10), a loudspeaker (100), and a mounting simulation analysis method therefor. The loudspeaker basket (10) comprises a basket body (1), and a fastener (2) for mounting the basket body (1) in an application scenario. The fastener (2) comprises: a connecting column (21) having a proximal end (211) and a distal end (212), with the proximal end (211) of the connecting column (21) being directly or indirectly connected to the basket body (1); and fins (22) arranged in pairs and respectively located on two sides of the connecting column (21), wherein each of the fins (22) has a proximal end (221) and a distal end (222), with the distance between the proximal end (221) of the fin (22) and the basket body (1) being less than the distance between the distal end (222) of the fin (22) and the basket body (1). The distal end (222) of each of the fins (22) is connected to the distal end (212) of the connecting column (21); a gap is provided between the proximal end (221) of each of the fins (22) and the connecting column (21); and each of the fins (22) has elasticity so as to allow an elastic sheet to draw close to the connecting column (21) after being pressed. The fastener (2) of the loudspeaker basket (10) has a large deformation and a large drawing force, and can prevent the loudspeaker (100) from falling off after being mounted.
The present disclosure relates to a coaxial speaker, which has better dust-proof and water-proof performance. The coaxial loudspeaker comprises a bass unit and a high-pitched unit coaxially arranged, the bass unit comprises a T-iron, a diaphragm and a voice coil connected to the diaphragm. The coaxial loudspeaker further comprises a cabin fixed on the T-iron, a lower portion of the cabin passes through the voice coil to connect with the T-iron, a top end portion of the cabin is located above the diaphragm, the high-pitched unit is arranged on the top end portion of the cabin, and the coaxial loudspeaker further comprises a dust-proof ring having an upper edge connected with the top end portion of the cabin and a lower edge connected with the upper portion of the voice coil.
H04R 1/24 - Combinaisons structurelles de transducteurs séparés ou de parties du même transducteur et sensibles respectivement à plusieurs bandes de fréquences
A speaker packaging device. The speaker packaging device comprises a base plate for supporting a plurality of speakers. The speaker packaging device also comprises a series of transverse baffles and a series of pairs of longitudinal baffles. The transverse baffles and the longitudinal baffles interlock over the base plate, forming a matrix of individual cells, or baffle units. Notches are preserved along each longitudinal baffle for accommodating the outer edges of the respective speakers within each baffle unit. In addition, a gap is preserved between adjacent baffle units to further accommodate the outer edges of the respective speakers. The notches are staggered along adjacent baffle units to conserve space.
B65D 5/49 - Séparations insérées dans le réceptacle
B65D 85/68 - Réceptacles, éléments d'emballage ou paquets spécialement adaptés à des objets ou à des matériaux particuliers pour machines, moteurs ou véhicules assemblés ou en pièces détachées
56.
PEDESTRIAN WARNING DEVICE SYSTEM AND PEDESTRIAN WARNING METHOD
A pedestrian warning device system and a pedestrian warning method, which can improve the sound quality of a pedestrian reminding sound for a low-speed new energy vehicle such as an electric vehicle and a hybrid vehicle. The pedestrian warning device system comprises a loudspeaker used for playing a warning sound and a power amplifier used for driving the loudspeaker to produce the sound. The pedestrian warning device system further comprises: a CAN interface circuit, which is used for obtaining a vehicle speed signal of the new energy vehicle; a processing device, which is used for receiving the vehicle speed signal transmitted by the CAN interface circuit and adjusting the frequency and/or amplitude of an audio signal according to the vehicle speed signal; and a low-pass filter, which is used for receiving the adjusted audio signal, performing low-pass filtering on the audio signal, and then inputting the audio signal to the power amplifier.
The present disclosure relates to a high-pitched loudspeaker, which widens the starting frequency of the high-pitched loudspeaker, and the high-pitched loudspeaker has a smoother intermediate frequency curve and less distortion. A high-pitched loudspeaker comprises a magnetic circuit system, a voice coil, and a diaphragm connected to the voice coil, wherein a first cavity is formed between the magnetic circuit system and the voice coil and the diaphragm, the high-pitched loudspeaker further comprises a back cover, the magnetic circuit system is arranged between the diaphragm and the back cover, and a second cavity is formed between the back cover and the magnetic circuit system, a through-hole is opened on the magnetic circuit system which communicates the first cavity and the second cavity to constitute an air gap cavity of the high-pitched loudspeaker.
H04R 9/02 - Transducteurs du type à bobine mobile, à lame mobile ou à fil mobile Détails
H04R 1/28 - Supports de transducteurs ou enceintes conçus pour réponse de fréquence spécifiqueEnceintes de transducteurs modifiées au moyen d'impédances mécaniques ou acoustiques, p. ex. résonateur, moyen d'amortissement
Disclosed is a multi-input-driving loudspeaker, which reduces the distortion of a loudspeaker and also improves the sensitivity and the definition of the loudspeaker. The multi-input-driving loudspeaker comprises a basket, and a cone arranged on the basket, and the loudspeaker further comprises a plurality of input driving mechanisms, wherein each input driving mechanism comprises a voice coil and a magnetic circuit assembly for driving the voice coil to vibrate; a plurality of magnetic circuit mounting holes are provided in the basket, and at most one magnetic circuit assembly is arranged at each magnetic circuit mounting hole; and the cone is provided with a plurality of voice coil mounting holes, and at most one voice coil is provided at each voice coil mounting hole.
Disclosed in the present invention is a damping analysis method for a pedestrian warning loudspeaker, which solves the problems existing in a traditional test method of the necessity of preparing a sample in advance, time-consuming and laborious sample development, high costs, investment, etc. A damping analysis method for a pedestrian warning loudspeaker, comprises: providing a geometric model of a damping system of a pedestrian warning loudspeaker, the damping system comprising a loudspeaker box, a damper and a support; establishing a finite element model of the damping system according to the geometric model, solving the finite element model, and obtaining, by means of post-processing, a change relationship between a displacement transmissibility of the damping system and a frequency; wherein the finite element model is solved by using a steady state analysis method, and the theoretical equations for solving are as follows: (I); and the displacement transmissibility satisfies the following equation: (II).
Disclosed is a mid-range speaker. The operating range of the mid-range speaker can extend to 20 KHz, and the speaker has an improved high-frequency directivity. A mid-range speaker, comprising a basket, a diaphragm arranged on the basket, a magnetic circuit system arranged on the basket, and a voice coil connected to the diaphragm, wherein the diaphragm comprises a cellular board having a front face and a back face, and covering films respectively covering the front face and the back face of the cellular board; and the cellular board is provided with a plurality of holes.
Disclosed is a loudspeaker system, wherein same can have a good low-frequency response without a large box and can effectively improve the efficiency of the loudspeaker system, so as to increase the sound pressure output of the system. A loudspeaker system, comprising a box and a plurality of loudspeakers arranged in the box and connected in parallel with each other, wherein each of the loudspeakers comprises a frame, a vibrating diaphragm arranged on the frame, and a voice coil for driving the vibration of the vibrating diaphragm; front faces of the vibrating diaphragms of the loudspeakers are arranged to face each other; a sound cavity is formed among the front faces of the vibrating diaphragms, and the sound cavity is in communication with the outside of the box; and each of the frames is located between a rear face of a respective vibrating diaphragm and an inner wall of the box.
Disclosed is a motion process analysis method for the vibrating system of a loudspeaker. A numerical value simulation analysis method is used to analyze the state of motion of the vibrating system of a moving-coil loudspeaker, and the deformation condition of the vibrating system when the loudspeaker is at different voice coil displacement positions is obtained through calculation, so as to modify a simulation model to replace repetitive sampling, thereby saving more resources and time. The method provides a geometric model of the vibrating system of a loudspeaker, a finite element model of the vibrating system is established according to the geometric model, and the finite element model is resolved to obtain the motion process parameters of the vibrating system through post processing.
G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
63.
LOUDSPEAKER MAGNETIC CIRCUIT SYSTEM AND LOUDSPEAKER
Disclosed in the present invention are a loudspeaker magnetic circuit system and a loudspeaker, which can improve the non-linearity of magnetic permeability, thereby reducing the distortion of the loudspeaker. A loudspeaker magnetic circuit system, comprising a T-yoke which has a base and a cylindrical portion protruding upward from the base, magnetic steel provided on the base and a front sheet provided on the magnetic steel, the magnetic steel and the front sheet being provided at the periphery of the cylindrical portion, and a short-circuit ring being provided on the inner side of the magnetic steel and/or the front sheet; and a first short-circuit ring is provided between the inner wall of the magnetic steel and the outer wall of the cylindrical portion, and a second short-circuit ring is provided on the inner wall of the front sheet.
A pedestrian alert device for an electric vehicle, comprising an accelerator pedal mechanism (1), a controller (2), and a sound producing mechanism (3). The controller (2) is electrically connected to the accelerator pedal mechanism (1) and the sound producing mechanism (3) respectively, and is disposed on the accelerator pedal mechanism (1). The accelerator pedal mechanism (1) comprises an installation box (11), an installation base (12) fixedly connected to the installation box (11), and an accelerator pedal (13) disposed on the installation base (12). The installation box (11) has a chamber, and the controller (2) is disposed in the chamber of the installation box (11). The controller (2) is electrically connected to the sound producing mechanism (3) by means of a wire (4). The installation box (11) is provided with a through-hole for passing through the wire (4). The pedestrian alert device incurs low costs and has a compact structure.
ZHEJIANG ELECTRO-ACOUSTIC R&D CENTER, CAS. (Chine)
Inventeur(s)
Tang, Jianfeng
Lu, Xiao
He, Rong
Li, Luhua
Chai, Guoqiang
Yue, Lei
Wang, Xiaoqing
Xu, Chulin
Zhou, Jianming
Wen, Zhoubin
Abrégé
A simulation and analysis method for speaker basket strength during screw mounting, able to assist in obtaining the strength of a speaker basket under a given torque, and assist in rapidly finding an appropriate screw mounting torque. A simulation and analysis method for speaker basket strength during screw mounting, comprising the following steps: on the basis of an assembly model of a speaker basket and a screw, establishing a finite element model of the speaker basket and the screw, using the finite element method to solve the finite element model, and by means of post-processing, obtaining the size of stress and of strain on the speaker basket when a given torque is reached during screw mounting, and a distribution map of same.
Provided is a pedestrian warning device having a grille cover, comprising having a cavity (10), an open warning device body (1), and a sound-emitting apparatus mounted inside said cavity (10); the pedestrian warning device further comprises a grille cover (3) coveringly arranged on one end part of the warning device body; the grille cover (3) comprises at least two grille layers spaced at intervals from the inside to the outside, each of said grille layers comprising a plurality of crossbeams (31a, 31b); the crossbeams (31a, 32a) are arranged at intervals so as to form gaps (31b, 32b) to enable gas to flow between adjacent crossbeams (31a, 32a), and the width of the gaps (31b, 32b) is not greater than the width of the crossbeams (31a, 32a); the crossbeams (31a, 32a) of adjacent grille layers are in an interleaving arrangement. The warning device can protect internal component parts, and the performance of the pedestrian warning device is not affected.
A method for designing a loudspeaker mesh cover based on a finite element method. The loudspeaker mesh cover is simulated and designed by a finite element method, such that the mesh cover shape can be optimized during predesign so as to adjust the performance of the loudspeaker, the progress of design and development of the loudspeaker is accelerated, and the development cost is reduced. The method comprises the following steps: S1, providing a three-dimensional model for a loudspeaker with a mesh cover; S2, establishing a finite element model for the loudspeaker with a mesh cover according to the three-dimensional model; S3, imparting the excitation of the loudspeaker to the finite element model; S4, setting parameters of the mesh cover; and S5, solving the finite element model by means of a control variable method and a parameterized scanning model, calculating frequency response curves corresponding to mesh covers with different parameters, and performing comparison and selecting the optimal solution.
An improved automotive headrest and an automotive seat with the improved automotive headrest. The automotive headrest comprises a support and a headrest body disposed on the support, the headrest body has a first cavity and a second cavity independent of one another, and the first cavity and the second cavity are provided with a speaker unit respectively, and the two speaker units are located on the left and right sides of the headrest body respectively. The automobile headrest has a simple structure, a small size, and a good visual field.
B60N 2/879 - Appuis-tête avec des caractéristiques supplémentaires ne se rapportant pas au positionnement de l’appui-tête, p. ex. des dispositifs de chauffage ou de refroidissement ou des haut-parleurs
H04R 1/02 - BoîtiersMeublesMontages à l'intérieur de ceux-ci
H04R 1/40 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement en combinant plusieurs transducteurs identiques
H04R 3/12 - Circuits pour transducteurs pour distribuer des signaux à plusieurs haut-parleurs
Disclosed is a coaxial loudspeaker, having better dustproof and waterproof performances. The coaxial loudspeaker comprises a bass unit and a tweeter unit that are coaxially arranged, wherein the bass unit comprises a T iron, a vibrating diaphragm and a voice coil connected to the vibrating diaphragm; the coaxial loudspeaker further comprises a cabin fixedly arranged on the T iron, a lower part of the cabin passes through the voice coil to connect to the T iron, a top end part of the cabin is located above the vibrating diaphragm, and the tweeter unit is arranged on the top end part of the cabin; and the coaxial loudspeaker further comprises a dustproof ring that has an upper edge connected to the top end part of the cabin and a lower edge connected to an upper part of voice coil.
The present invention relates to a high pitch loudspeaker. The high pitch loudspeaker has a broadened starting frequency, a smooth intermediate frequency curve, and a small distortion. The high pitch loudspeaker comprises a magnetic circuit system, a voice coil, and a vibrating diaphragm connected with the voice coil. A first cavity is formed among the magnetic circuit system, the voice coil and the vibrating diaphragm; the high pitch loudspeaker further comprises a rear cover; the magnetic circuit system is disposed between the vibrating diaphragm and the rear cover; a second cavity is formed between the rear cover and the magnetic circuit system; and a through hole is formed in the magnetic circuit system, and the through hole communicates the first cavity and the second cavity such that an air gap cavity of the high pitch loudspeaker is formed.
Disclosed are an improved automobile headrest and an automobile seat having the improved automobile headrest. The automobile headrest comprises a bracket (200), and a headrest body (100) arranged on the bracket (200), wherein the headrest body (100) is internally provided with a first cavity and a second cavity which are independent of each other, the first cavity and the second cavity are each internally provided with a loudspeaker unit, and the two loudspeaker units are respectively located on the left and right sides of the headrest body (100). The automobile headrest has a simple structure, a small size and a good visual field.
B60N 2/879 - Appuis-tête avec des caractéristiques supplémentaires ne se rapportant pas au positionnement de l’appui-tête, p. ex. des dispositifs de chauffage ou de refroidissement ou des haut-parleurs
The invention discloses a speaker packaging device and a package body. The invention has a simple structure and provides good protection of speakers. The speaker packaging device comprises a base plate for bearing a speaker, at least two horizontal blocking plates extending laterally, and at least one vertical blocking plate unit. The vertical blocking plate unit is composed of two vertical blocking plates extending in a vertical direction and spaced apart from each other. A bottom end portion of the horizontal blocking plate and a bottom end portion of the vertical blocking plate are connected to the bottom plate. The adjacent horizontal blocking plates are spaced apart from each other in a vertical direction. The pair of vertical blocking plates of each vertical blocking plate unit are connected between two adjacent horizontal blocking plates to define a space for accommodating a speaker. The vertical blocking plate is provided with a notch for engaging with a protruding portion of an outer edge of a speaker. Notches on two vertical blocking plates of the same vertical blocking plate unit are aligned with each other.
B65D 85/30 - Réceptacles, éléments d'emballage ou paquets spécialement adaptés à des objets ou à des matériaux particuliers pour objets particulièrement sensibles aux dommages par chocs ou compression
B65D 81/02 - Réceptacles, éléments d'emballage ou paquets pour contenus présentant des problèmes particuliers de stockage ou de transport ou adaptés pour servir à d'autres fins que l'emballage après avoir été vidés de leur contenu spécialement adaptés pour protéger leur contenu des dommages mécaniques
75.
Error model-based multi-zone sound reproduction method and device
An error model-based multi-zone sound reproduction method includes arranging a speaker array, and setting control points for a bright zone and a dark zone. The bright zone is a zone requiring the generation of an independent sound source. The dark zone is a zone not requiring the generation of an independent sound source. The method further includes conducting probability distribution modeling on the speaker frequency response errors. The method further includes, according to the error distribution model, respectively listing expected average sound energy expressions of the bright zone and the dark zone and a frequency response consistency constraint expression of the bright zone. The method further includes calculating a time-domain impulse response filter signal of each channel according to the time-domain sound energy contrast control criterion of the frequency response consistency constraint.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Optical communication instruments; megaphones; material
testing instruments and machines; semi-conductors; wafers
for integrated circuits; integrated circuits; computer
chips.
Disclosed are a sound playback method and system for realizing sound volume differences in multiple zones. A sound playback method for realizing sound volume differences in multiple zones sequentially comprises the following steps: S1, setting control points of sound playback zones Z1, Z2..., and ZN, wherein N is greater than or equal to 2; S2, taking a target sound volume level 11 of the zone Z1 as a reference, setting the target sound volume levels of the zones Z2..., and ZN to be 12..., and 1N respectively, and setting target response vectors at the control points in the zones Z1, Z2..., and ZN to be d1, d2..., and dN respectively; S3, acquiring transfer function matrices G1, G2..., and GN from a loudspeaker array to the control points of the zones Z1, Z2..., and ZN; S4, adding a pre-set random error interference to the transfer function matrices G1, G2..., and GN, so as to obtain transfer function matrices G̃1, G̃2..., and G̃N with the random error interference; and S5, performing optimization processing to calculate the weight vector w of the loudspeaker array.
The present invention discloses an implementation method and a device of a multi-bit Δ-Σ modulation-based digital speaker system. The method comprises, 1) digital format converting; 2) oversampling interpolation filtering; 3) multi-bit Δ-Σ modulating; 4) thermometer coding; 5) multi-channel mismatch shaping; 6) coding format converting; 7) multi-channel digital power-amplifying; 8) driving a speaker array or a multiple voice coil speaker to sound. The device comprises: a digital input interface, an oversampling interpolation filter, a multi-bit Δ-Σ modulator, a thermometer coder, a multi-channel mismatch shaper, a coding format converter, a multi-channel digital power-amplifier, and a speaker array or a multiple voice coil speaker; each portion being connected in proper order. The present invention can achieve a high-power output under a low-voltage power supply, save power consumption, implement a single-chip integration of a multi-channel reproducing system, reduce the volume and weight of the system and the implementing cost, and improve the quality of the reproduced sound.
H04S 5/00 - Systèmes pseudo-stéréophoniques, p. ex. dans lesquels les signaux d'un canal supplémentaire sont dérivés du signal monophonique par déphasage, retardement ou réverbération
H03F 3/183 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs
H03F 3/185 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs comportant des dispositifs à effet de champ
H03F 3/21 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C comportant uniquement des dispositifs à semi-conducteurs
H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
H03F 3/68 - Combinaisons d'amplificateurs, p. ex. amplificateurs à plusieurs voies pour stéréophonie
H03M 3/04 - Modulation différentielle à plusieurs bits
H03M 3/00 - Conversion de valeurs analogiques en, ou à partir d'une modulation différentielle
Disclosed are a channel state selection method and device based on ternary coding. The method comprises: performing modulation processing on a sound source signal to generate (2L+1) level quantization signals x; performing mapping transformation on the quantization signals x to generate control signals p, m and z; performing selection processing on the control signals p, m and z and an M-channel feedback signal b, and then, outputting an M-channel state vector signal y; performing shaping processing on the state vector signal y, and then, generating the M-channel feedback signal b; and completing electric-acoustic conversion after the state vector signal y passes through a multi-channel power amplifier and an energy converter unit. The device comprises a modulator module, a mapping module, a selection module, a shaping module, and a multi-channel digital power amplifier and a loudspeaker array or a multi-voice-coil loudspeaker unit module, which are connected in sequence. The present invention can effectively reduce hardware resource overheads, reduce hardware power consumption, improve system stability, further improve the amplitude of an output signal, and improve conversion efficiency, and has a high signal-to-noise ratio output capacity.
The present invention relates to an error model-based multi-area sound reproduction method, comprising: arranging a speaker array and setting control points of a bright area and a dark area, the bright area being an area requiring the generation of an independent sound source, and the dark area being all areas not requiring the generation of an independent sound source; conducting probability distribution modeling on a speaker frequency response error; according to the error distribution model, respectively listing expected average sound energy expressions of the bright area and the dark area and a frequency response compliance constraint expression of the bright area; and calculating a time-domain impulse response filter signal of each channel according to the time-domain sound energy comparison and control criterion of the frequency response compliance constraint. Compared to conventional methods, the present invention effectively reduces contrast performance degradation caused by speaker frequency response error, and improves robustness and reliability of the device.
A vibration diaphragm, especially a vibration diaphragm used for a loudspeaker, is disclosed in the present invention. The vibration diaphragm includes: a hollow, truncatedly conical diaphragm body with a first end, a second end, a front surface and a rear surface, wherein the front surface and the rear surface are arranged between the first end and the second end, and the inner diameter of the first end is larger than the inner diameter of the second end; an elastic annular edge having an annular shape matched with the first end of the diaphragm body, and connected with the first end of the diaphragm body; and at least three balancing patches in the shape of a sheet, the patches being all fixed on the front surface and/or the rear surface of the diaphragm body. The balancing patches are attached to the front surface of the diaphragm body, and arranged at equal intervals along the circumferential direction of the diaphragm body. The object of the present invention is to provide a vibration diaphragm capable of reducing distortion effectively.
Provided is an automatic equalization method for a loudspeaker, which improves the sound replay performance of a loudspeaker system in a full frequency band. The method comprises: measuring impulse responses at one or more location points in a room by means of a loudspeaker, obtaining a frequency response at each location point and a low-frequency lower limit of the loudspeaker system, utilizing a self-adaptive optimization algorithm to obtain an equalization filter, and compensating the loudspeaker system. With regard to a low-frequency signal lower than a lower limit frequency of the loudspeaker system, the missing fundamental principle based on psychoacoustics is utilized, and a high order harmonic component of a fundamental frequency signal is generated and is superposed with a delayed original audio signal after gain control, and thus the sound replay capability of the loudspeaker system in the full frequency band is improved.
The present invention discloses a method and apparatus for implementing a multi-bit Δ-∑ modulation-based digital speaker system. The method comprises: 1) digital format conversion; 2) oversampling interpolation filtering; 3) multi-bit Δ-∑ modulation; 4) thermometer coding; 5) multi-channel mismatch shaping; 6) encoding format conversion; 7) multi-channel digital power amplification; 8) driving a speaker array or a multi-coil speaker unit to sound. The apparatus comprises: a digital input interface, an oversampling interpolation filter, a multi-bit Δ-∑ modulator, a thermometer encoder, a multi-channel mismatch shaper, an encoding format converter, a multi-channel digital power amplifier, and a speaker array or multi-coil speaker unit; The parts are connected in sequential order. The present invention achieves high power output when low-voltage power is supplied, conserves electricity, achieves single-chip integration of a multi-channel playback system, reduces the volume, weight, and cost of implementation of the system, and improves the quality of the reproduced sound.
A method and device for driving a digital speaker based on code conversion are provided in the invention. The method comprises the steps of: (1) converting input format; (2) performing multi-bit Σ-Δ modulation; (3) thermometer code conversion; (4) dynamic mismatch-shaping processing; (5) pulse width modulation code conversion; and (6) controlling on/off status switching of the MOSFET of a full-bridge power amplification network to drive a digital speaker load sound. The device comprises a sound source, an input format converter, a multi-bit Σ-Δ modulator, a thermometer coder, a dynamic mismatch shaper, a code converter, a multi-channel digital amplifier and a digital speaker load which are connected to each other in sequence. By means of the device and method of the invention, the switching rate of the power tube, the power dissipation and heating generated during the switching are reduced, the sound quality and efficiency of electroacoustic restoration are improved, the volume, weight and implementation cost of the system are decreased, and the level of electromagnetic radiation is reduced. Furthermore, the device and method of the invention also have excellent immunity to the frequency response deviation of multiple digital channels.
Provided is a ceiling type acoustic apparatus based on bean control. The apparatus comprises an audio product, a controller, and a sounding module. The audio product has a first end connected to the controller in an interactive mode, and a second end connected to a wireless module in a wireless interactive mode. The controller is connected to the first end of the audio product in an interactive mode; and the controller implements the pairing of the sounding module and the audio product after the audio product sends instruction information, and the controller can also receive or generate expected information of a user. The sounding module comprises a wireless module, a beam control module, a power amplifier module, and a loudspeaker array. The wireless module is connected to the second end of the audio product in an interactive mode. The beam control module is electrically connected to the controller and the wireless module. An input end of the power amplifier module is connected to an output end of the beam control module, and an output end of the power amplifier module is electrically connected to the loudspeaker array. The loudspeaker array comprises multiple loudspeaker units, and each loudspeaker unit is used for implementing electroacoustic transduction.
An intelligent balancing apparatus for a sound field in a vehicle comprises a speaker array (4), a microphone array (1), a sound field balancing processor (2), and a multichannel power amplifier (3). The speaker array (4) comprises multiple speaker units disposed in multiple position points in the vehicle, and each speaker unit is used for sending sound information to a space in the vehicle. The microphone array (1) comprises at least one microphone unit (10), the microphone unit (10) is disposed in a to-be-balanced area, and is used for picking up sound field information formed by the superposition of the multiple speaker units and converting the sound field information to an electric signal. The sound field balancing processor (2) is provided with an input end correspondingly connected to an output end of the microphone unit (10), and is used for obtaining an optimized balancing processor parameter of any speaker unit. An input end of the multichannel power amplifier (3) is connected to an output end of the sound field balancing processor (2), an output end of the multichannel power amplifier (3) is connected to the speaker array (4), and the multichannel power amplifier (3) is used for driving the multiple speaker units (10) to carry out electroacoustic transduction.
Provided is a vibration diaphragm (1). A diaphragm body of a vibration diaphragm comprises a main body (2) in a truncated cone shape, and the diaphragm body (2) also comprises at least one first bulge (3) protruded to the front surface of the diaphragm body (2) relative to the main body, wherein at least one second bulge (4) protruded to the front surface of the diaphragm body (2) relative to the main body is formed on the first bulge (3). Provided is a vibration diaphragm. The diaphragm body (2) comprises a main body in a truncated cone shape, and the diaphragm body (2) also comprises at least one first bulge (3) protruded to the front surface of the diaphragm body (2) relative to the main body, wherein at least one first depression (5) depressed to the front surface of the diaphragm body (2) relative to the main body is formed on the first bulge (3). Provided is a vibration diaphragm. The diaphragm body (2) comprises a main body in a truncated cone shape, and the diaphragm body (2) also comprises at least one first bulge (3) protruded to the front surface of the diaphragm body relative to the main body, wherein at least one first depression (5) depressed to the front surface of the diaphragm body (2) relative to the main body and at least one second bulge(4) protruded to the front surface of the diaphragm body (2) relative to the main body are formed on the first bulge (3).
Provided is a vibration diaphragm (1) used for a loudspeaker, comprising: two ends, and a diaphragm body which is located between the two ends and is provided with a front surface and a back surface, wherein the inner diameter of one end is greater than that of the other end, the cross section of the diaphragm body is in a ring shape, and the diaphragm body comprises a main body (11) in a truncated cone shape, characterized in that, at least one rough part (2) is arranged on the diaphragm body. Provided is a processing method for a vibration diaphragm. The method comprises the following steps: beating; fishing slurry; hot pressing, freely drying a rough part (2) in the hot-pressing process; and punching. Provided is a processing device for a vibration diaphragm. The device comprises: an upper mould and a lower mould, wherein a lower pressing mould surface is formed on the upper part of the lower mould, and an upper pressing mould surface corresponding to the lower pressing mould surface is formed on the lower part of the upper mould; and one of the upper pressing mould surface and the lower pressing mould surface is provided with a non-pressing lug boss. Provided is a loudspeaker comprising a vibration diaphragm.
A diaphragm is disclosed in the invention, which comprises a one-piece diaphragm body and a plurality of mass blocks mounted on the diaphragm body. Each of the mass blocks substantially has the same radial distance from the center of the diaphragm. The mass blocks are divided into three or more arrays each of which includes one or more mass blocks. the arrays are distributed along the circumference direction of the diaphragm body, and the mass blocks in each array are distributed along the circumference direction of the diaphragm. The mass blocks are elastic and made of materials with internal damping, such as rubber, silicone or foam rubber. At least one of the mass blocks is connected to an annular roll fixed on the peripheral edge of the diaphragm body, and the mass blocks are bonded to the diaphragm body.
A method and device for balancing frequency response of a sound playback system through online iteration. The method comprises: (1) turning the system to a balancing mode, setting a sound source (1) as a noise signal, then controlling the system to play the noise signal, and acquiring and recoding a feedback signal through a sensor; (2) combining the noise signal and the feedback signal, and estimating parameters of all levels of balancers sequentially through a least mean squares (LMS) criterion of step-by-step iteration; (3) cascading the all levels of the balancers to form a synthesized balancer; and (4) placing the synthesized balancer to a signal processing channel, finishing the operation of balancing the system frequency response, and then turning the system to a normal play mode. The device comprises the sound source (1), a digital signal processor (2), a power amplifier (3), a loudspeaker (4), and a feedback signal receiving module (5).
H03M 13/11 - Détection d'erreurs ou correction d'erreurs transmises par redondance dans la représentation des données, c.-à-d. mots de code contenant plus de chiffres que les mots source utilisant un codage par blocs, c.-à-d. un nombre prédéterminé de bits de contrôle ajouté à un nombre prédéterminé de bits d'information utilisant plusieurs bits de parité
H03M 13/27 - Codage, décodage ou conversion de code pour détecter ou corriger des erreursHypothèses de base sur la théorie du codageLimites de codageMéthodes d'évaluation de la probabilité d'erreurModèles de canauxSimulation ou test des codes utilisant des techniques d'entrelaçage
94.
METHOD AND DEVICE FOR BALANCING FREQUENCY RESPONSE OF SOUND PLAYBACK SYSTEM THROUGH OFFLINE ITERATION
Disclosed are a method and a device for balancing frequency response of a sound playback system through offline iteration. The method comprises: (1) acquiring a pulse response sequence of a system to be balanced by using a measuring instrument; (2) acquiring feedback signals by selecting noise signals and utilizing the convolution of the noise signals and the pulse response sequence; (3) sequentially estimating parameters of all levels of balancers by using a least squares criterion of gradual iteration according to the noise signals and the feedback signals; (4) cascading the all levels of balancers to form a synthesized balancer; and (5) updating coefficients of a finite impulse response (FIR) filter by using parameters of the synthesized balancer to finish system frequency response balancing. The device comprises a sound source, a digital signal processor, a power amplifier and a loudspeaker which are sequentially connected with one another. According to the device, the response balancing capacity of the balancers can be obviously improved by increasing the number of the cascaded balancers; the balancing task of complex calculation can be processed conveniently in an offline estimation mode; and moreover, the hardware manufacturing cost of the balancers is saved.
The present invention discloses a method and device for controlling speaker array sound field based on a quadratic residue sequence combination. The method comprises steps of: (1) fragmenting a designated quadratic residue sequence in terms of the number of array elements, to generate a plurality of quadratic residue subsequences; (2) designing an optimal array phase delay vector utilizing these subsequences; (3) controlling transmission signals of multi-element channels according to the optimal phase delay vector to adjust phase delay; (4) sending the multi-channel signals subjected to adjustment to a multi-channel power amplifier, to drive the speaker array to generate uniform sound field. The device comprises a sound source, an optimal phase delay estimator, an optimal phase delay controller, a multi-channel power amplifier and a speaker array. The invention can expand the coverage range of sound field radiated from an array and improve uniformity of the sound field. Furthermore, according to the invention, the hardware implementation of the control method of sound field is simple, and the spatial distribution characteristics of sound field meet the requirements of array sound reinforcement system.
H04R 1/02 - BoîtiersMeublesMontages à l'intérieur de ceux-ci
G06F 17/00 - Équipement ou méthodes de traitement de données ou de calcul numérique, spécialement adaptés à des fonctions spécifiques
H04S 3/00 - Systèmes utilisant plus de deux canaux, p. ex. systèmes quadriphoniques
H04R 1/40 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement en combinant plusieurs transducteurs identiques
96.
ACOUSTIC FIELD CONTROL METHOD AND DEVICE FOR LOUDSPEAKER ARRAY
A quadratic residue sequence combination-based acoustic field control method and device for a loudspeaker array. The method comprises: (1) cutting a designated quadratic residue sequence in accordance with the number of array elements into blocks to generate a plurality of quadratic residue subsequences; (2) using these subsequences to design an optimum array phase-delay vector; (3) in accordance with the optimal phase-delay vector, controlling a transmission signal of a multi-array element passage to perform phase-delay adjustment; and (4) sending the multi-passage signal on which phase-delay adjustment is performed to a multi-passage power amplifier so as to drive a loudspeaker array to generate a uniform acoustic field. The device comprises a sound source, an optimal phase-delay estimator, an optimal phase-delay controller, a multi-passage power amplifier and a loudspeaker array. The method and device can be applied to effectively extend the coverage range of an array space radiation acoustic field, and improve the uniformity of the array space radiation acoustic field. The hardware implementation of the acoustic field control method is simple, thereby meeting the requirements of an array sound-reinforcement system for the spatial distribution quality of an acoustic field.
The invention discloses a method and a device for driving a digital speaker based on code conversion. The method includes: (1) converting input formats; (2) performing multi-bit Sigma-delta modulation; (3) performing thermometer code conversion; (4) performing dynamic mismatch-shaping; (5) performing pulse width modulation code conversion; and (6) controlling an MOSFET (metal oxide semiconductor field effect transistor) of a full-bridge power amplifier network to switch on-off states and driving a digital speaker load to produce sound. The device comprises a sound source, an input format converter, a multi-bit Sigma-delta modulator, a thermometer encoder, a dynamic mismatched shaper, a code converter, a multi-channel digital power amplifier and the digital speaker load which are sequentially connected. With the invention, the switching speed of a power tube, the power consumption and heat generated by the power tube in the switching process are reduced, the acoustic quality and efficiency of electro-acoustic reduction are improved, the size and the weight of a system and implementation cost are reduced, electromagnetic radiation level is reduced, and the immunity against frequency response deviation of multiple digital channels is enhanced.
Disclosed in the present invention are a method and an apparatus for channel equalization and beam control of digital speaker array system. The method comprises: 1) digital format conversion; 2) channel equalization processing; 3) beam generation control; 4) multi-bit ∑-Δ modulation; 5) thermometer code conversion; 6) dynamic mismatch shaping processing; 7) extracting channel information, and sending it to a digital power amplifier for driving the array to make sound. The apparatus includes: a sound source, a digital converter, a channel equalizer, a beam generator, a ∑-Δ modulator, a thermometer coder, a dynamic mismatch shaper, an extraction selector, a multi-channel digital power amplifier, and a speaker array. All units are connected successively. The present invention enables a fully digital system, with the advantages of reducing the volume, power consumption and cost of the system, enhancing electro-acoustic conversion efficiency and anti-interference ability, and improving the evenness of the frequency response in the audio frequency band of the system, and also enables the beam directional control of the digital array, thus providing an effective approach to the generation of the special sound effects.
A method and device of channel equalization and beam controlling for a digital speaker array system includes (1) converting digital format; (2) performing channel equalization; (3) controlling beam-forming; (4) performing multi-bit Σ-Δ modulation; (5) performing thermometer code conversion; (6) performing dynamic mismatch-shaping processing; and (7) extracting the channel information to send to the digital power amplifier and drive the array sound. A device includes a sound source, a digital converter, a channel equalizer, a beam-former, a Σ-Δ modulator, a thermometer coder, a dynamic mismatch shaper, an extraction selector, a multi-channel digital power amplifier and a speaker array. Each unit connects to each other serially.
H03G 5/00 - Commande de tonalité ou commande de largeur de bande dans les amplificateurs
H04R 1/40 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement en combinant plusieurs transducteurs identiques
H03G 3/00 - Commande de gain dans les amplificateurs ou les changeurs de fréquence
H04R 5/02 - Dispositions spatiales ou structurelles de haut-parleurs
H04R 3/12 - Circuits pour transducteurs pour distribuer des signaux à plusieurs haut-parleurs
H04R 3/04 - Circuits pour transducteurs pour corriger la fréquence de réponse
Disclosed are a speaker vibration diaphragm and a speaker comprising the vibration diaphragm. A protrusion is formed on a diaphragm body of the speaker vibration diaphragm. This lowers the peak of mid-high frequency range of a frequency response curve of the speaker, thus relatively smoothing the frequency response curve in mid-high frequency range, improving sound effect of mid-high frequency range, and reflecting realistically the original sound.
