A time at which a failure of a noise level meter has occurred is accurately determined. The present invention relates to a noise measuring device including a noise level meter having a main microphone capable of measuring noise, and a sub microphone capable of measuring noise at the same time as the main microphone. The present invention also relates to a failure diagnosing system having the noise measuring device and a failure diagnosing device capable of diagnosing a failure of the main microphone. The present invention also relates to a failure diagnosing method for diagnosing a failure of the main microphone. In the failure diagnosing system and the method, the presence or absence of a failure of the main microphone in the noise level meter is diagnosed based on the comparison between main and sub noise data obtained by the main and sub microphones and respectively in each of a plurality of recording periods.
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
iii as the representative values or the sums of a plurality of evaluation sample values; and a step S5 for calculating a sound field of the room 1 on the basis of the evaluation index g. The present invention further relates to a sound-field evaluation program for executing the sound-field evaluation method, and a computer-readable recording medium recording the same.
G01H 17/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores non prévue dans les autres groupes de la présente sous-classe
4.
FAILURE DIAGNOSIS METHOD, NOISE MEASUREMENT DEVICE, AND FAILURE DIAGNOSIS SYSTEM
The present invention determines exactly when a failure occurred in a noise meter. The present invention relates to a noise measurement device 20 comprising: a noise meter 10 having a main microphone 11 capable of measuring noise; and a secondary microphone 21 capable of measuring noise simultaneously with the main microphone 11. The present invention also relates to a failure diagnosis system 1 comprising the noise measurement device 20 and a failure diagnosis device 30 capable of diagnosing a failure of the main microphone 11. The present invention also relates to a failure diagnosis method for diagnosing a failure of the main microphone 11. In the failure diagnosis system 1 and method, the presence or absence of a failure of the main microphone 11 in the noise meter 10 is diagnosed on the basis of comparison of main and secondary noise data respectively obtained by the main and secondary microphones 11, 21 in each of a plurality of recording periods.
G01H 3/00 - Mesure des vibrations en utilisant un détecteur dans un fluide
G01H 17/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores non prévue dans les autres groupes de la présente sous-classe
5.
Mixing device, mixing method, and non-transitory computer-readable recording medium
A mixing device of a first signal and a second signal on a time-frequency plane, includes a control signal generation unit to generate a control signal indicating whether to perform prioritized mixing that includes amplification of the first signal and attenuation of the second signal; and a gain derivation unit to derive a first gain for amplifying the first signal and a second gain for attenuating the second signal based on the control signal. The control signal takes at least a first value and a second value different from the first value, wherein the first value is not continuous beyond a predetermined bandwidth on a frequency axis. The mixing device applies the prioritized mixing to the first and second signals when the control signal indicates the first value, and applies simple addition to the first and second signals when the control signal indicates the second value.
G10L 21/0332 - Détails du traitement à cet effet impliquant la modification des formes d’onde
G10L 21/0364 - Amélioration de l'intelligibilité de la parole, p. ex. réduction de bruit ou annulation d'écho en changeant l’amplitude pour améliorer l'intelligibilité
An information processing device includes a first time-frequency converter configured to perform a time-frequency conversion with respect to an input signal, using a window function having a first width, a second time-frequency converter configured to perform a time-frequency conversion with respect to the input signal, using a second window function having a second width smaller than the first width, and a modification processing unit configured to modify an output of the second time-frequency converter, using a frequency analysis result based on an output of the first time-frequency converter.
H04R 3/04 - Circuits pour transducteurs pour corriger la fréquence de réponse
G10L 25/18 - Techniques d'analyse de la parole ou de la voix qui ne se limitent pas à un seul des groupes caractérisées par le type de paramètres extraits les paramètres extraits étant l’information spectrale de chaque sous-bande
7.
Mixing apparatus, mixing method, and non-transitory computer-readable recording medium
A mixing apparatus having a stereo output includes: a first signal processor that mixes a first signal and a second signal in a first channel; a second signal processor that mixes a third signal and a fourth signal in a second channel; a third channel that processes a weighted sum of a signal of the first channel and a signal of the second channel; and a gain deriving part that generates a gain mask commonly used in the first channel and the second channel, wherein the gain deriving part determines a first gain commonly applied to the first signal and the third signal, and a second gain commonly applied to the second signal and the fourth signal, so that predetermined conditions for simultaneous gain generation are satisfied at least at the first channel and the second channel among the first channel, the second channel, and the third channel.
H04B 1/00 - Détails des systèmes de transmission, non couverts par l'un des groupes Détails des systèmes de transmission non caractérisés par le milieu utilisé pour la transmission
G10L 21/0332 - Détails du traitement à cet effet impliquant la modification des formes d’onde
H04S 3/00 - Systèmes utilisant plus de deux canaux, p. ex. systèmes quadriphoniques
H03F 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
G10L 21/0364 - Amélioration de l'intelligibilité de la parole, p. ex. réduction de bruit ou annulation d'écho en changeant l’amplitude pour améliorer l'intelligibilité
8.
Device for collecting aircraft operation history information
Operation history information on every aircraft can be collected, and efficiency in collection of the aircraft operation history information can be improved. The present invention includes: an image acquisition unit 11 configured to acquire an image G obtained by imaging a route R or A2; an image-type model identification unit 21 configured to identify a model of an aircraft P in the route R or A2 based on appearance data of an aircraft Q in the image G acquired by the image acquisition unit 11 and aircraft appearance samples previously prescribed for respective models; and an operation history storage unit 45 configured to store image-derived model information identified by the image-type model identification unit 21.
Musical instruments. Building structures of wood having the property of sound
absorbing; building structures of wood having the property
of sound diffusing; building structures of wood having the
property of sound absorbing and diffusing; floorings, walls
and ceilings having property of sound absorbing; floorings,
walls and ceilings having property of sound reflecting;
floorings, walls and ceilings having property of sound
absorbing and reflecting; materials for use in the
construction of walls, not of metals; coverings for use in
the construction of walls, not of metals; non-metallic
minerals for building or construction; ceramic building
materials, bricks and refractory products; building
materials of ceramic, plastic, synthetic materials, rubber,
wood, stone or glass; wall claddings, not of metal, for
building; wall linings, not of metal, for building; wall
panels, not of metal; building materials made of plastic;
synthetic building materials; asphalt and materials for
building or construction made of asphalt; rubber materials
for building or construction; lime materials for building
and construction; building and construction materials made
of plasters; building materials, namely, semi-worked woods;
stones; glass for building. Furniture; furniture partitions; byoubu [oriental folding
partition screens]; meerschaum; yellow amber; sculptures of
plaster; sculptures of plastic; sculptures of wood; bamboo;
bamboo skins, unworked or partly worked; tree barks; tusks,
unworked or partly worked; whalebones; shells and crusts;
artificial horns; ivory, unworked or partly worked; animal
horns; animal teeth; tortoiseshell, unworked or partly
worked; animal bone, unworked or partly worked; corals,
unworked or partly worked.
Musical instruments. Building structures of wood having the property of sound
absorbing; building structures of wood having the property
of sound diffusing; building structures of wood having the
property of sound absorbing and diffusing; floorings, walls
and ceilings having property of sound absorbing; floorings,
walls and ceilings having property of sound reflecting;
floorings, walls and ceilings having property of sound
absorbing and reflecting; materials for use in the
construction of walls, not of metals; coverings for use in
the construction of walls, not of metals; non-metallic
minerals for building or construction; ceramic building
materials, bricks and refractory products; building
materials of ceramic, plastic, synthetic materials, rubber,
wood, stone or glass; wall claddings, not of metal, for
building; wall linings, not of metal, for building; wall
panels, not of metal; building materials made of plastic;
synthetic building materials; asphalt and materials for
building or construction made of asphalt; rubber materials
for building or construction; lime materials for building
and construction; building and construction materials made
of plasters; building materials, namely, semi-worked woods;
stones; glass for building. Furniture; furniture partitions; byoubu [oriental folding
partition screens]; meerschaum; yellow amber; sculptures of
plaster; sculptures of plastic; sculptures of wood; bamboo;
bamboo skins, unworked or partly worked; tree barks; tusks,
unworked or partly worked; whalebones; shells and crusts;
artificial horns; ivory, unworked or partly worked; animal
horns; animal teeth; tortoiseshell, unworked or partly
worked; animal bone, unworked or partly worked; corals,
unworked or partly worked.
Musical instruments. Building structures of wood having the property of sound
absorbing; building structures of wood having the property
of sound diffusing; building structures of wood having the
property of sound absorbing and diffusing; floorings, walls
and ceilings having property of sound absorbing; floorings,
walls and ceilings having property of sound reflecting;
floorings, walls and ceilings having property of sound
absorbing and reflecting; materials for use in the
construction of walls, not of metals; coverings for use in
the construction of walls, not of metals; ceramic building
materials, bricks and refractory products; building
materials of ceramic, plastic, synthetic materials, rubber,
wood, stone or glass; wall claddings, not of metal, for
building; wall linings, not of metal, for building; wall
panels, not of metal; building materials made of plastic;
synthetic building materials; asphalt and materials for
building or construction made of asphalt; rubber materials
for building or construction; lime materials for building
and construction; building and construction materials made
of plasters; building materials, namely, semi-worked woods;
stones; glass for building. Furniture; unit type furniture; furniture partitions; byoubu
[oriental folding partition screens]; meerschaum; yellow
amber; sculptures of plaster; sculptures of plastic;
sculptures of wood; bamboo; bamboo skins, unworked or partly
worked; tree barks; tusks, unworked or partly worked;
whalebones; shells and crusts; artificial horns; ivory,
unworked or partly worked; animal horns; animal teeth;
tortoiseshell, unworked or partly worked; animal bone,
unworked or partly worked; corals, unworked or partly
worked.
This sound-absorbing wedge can reduce acoustic reflection and can also reduce weight. The present invention relates to a sound-absorbing wedge 1 that includes a wedge portion 2 that is formed in the shape of a mountain so as to have ridge lines 2a. The sound-absorbing wedge 1 has a protective cloth 3 that is arranged at the outside surface of the wedge portion 2 so as to form a wedge portion 2 internal space 2b. The protective cloth 3 has body parts 4 and stiff parts 5 that are stiffer than the body parts 4. The stiff parts 5 are arranged along the ridge lines 2a of the wedge portion 2, and the protective cloth 3 is supported by the stiff parts 5.
This acoustic adjustment shelf is configured to make it possible to easily adjust an acoustic characteristic, and improve the beauty of space where the acoustic characteristic is to be adjusted. This acoustic adjustment shelf comprises: a shelf member having a plurality of sections; and an acoustic adjustment member detachably installed in at least one section among the plurality of sections, and configured so as to change the characteristic of inputted sound.
Musical instruments Wooden building structures intended as non-metal audio-room structures having the property of sound absorbing; Wooden building structures intended as non-metal audio-room structures having the property of sound diffusing; Wooden building structures intended as non-metal audio-room structures having the property of sound absorbing and diffusing; floorings, namely, construction materials in the nature of non-metal flooring materials, also having sound absorbing and reflecting properties; walls in the nature of prefabricated non-metal walls, non-metal wall panels, and non-metal wall boards, also having sound absorbing and reflecting properties; ceilings in the nature of non-metal ceiling panels and non-metal ceiling boards, also having sound absorbing and reflecting properties; materials for use in the construction of walls, not of metals, namely, non-metal wall panels and non-metal wall boards; coverings for use in the construction of walls, not of metals, namely, prefabricated non-metal wall coverings in the nature of non-metal wall panels and non-metal wall boards; ceramic building materials, bricks and refractory products, namely, ceramic building boards and panels, bricks, refractory construction materials; non-metal building materials of ceramic, namely, ceramic building boards and panels; non-metal building materials of plastic, namely, plastic building boards and panels; synthetic materials, namely, non-metal building boards and panels made of synthetic materials, rubber, wood, stone or glass; wall claddings, not of metal, for building; wall linings, not of metal, for building; wall panels, not of metal; building materials made of plastic, namely, plastic building boards and panels; synthetic building materials, namely, non-metal building boards and panels made of synthetic materials; asphalt and materials for building or construction made of asphalt, namely, asphalt building and construction boards and panels; rubber materials for building or construction, namely, rubber building and construction boards and panels; lime materials for building and construction, namely, lime building materials and non-agricultural lime for use in construction; building and construction materials made of plasters, namely, plaster building and construction boards and panels; building materials, namely, semi-worked woods; stones; glass for building Furniture; unit type furniture, namely, wall units; furniture partitions; byoubu being oriental folding partition screens; meerschaum, raw or partly worked; yellow amber, raw or partly worked; sculptures of plaster; sculptures of plastic; sculptures of wood; bamboo furniture; bamboo skins, unworked or partly worked, for furniture; furniture made from tree bark; Shells, unworked or semi-worked; artificial horns; animal teeth; tortoiseshell, unworked or partly worked; corals, unworked or partly worked
Musical instruments Wooden building structures intended as non-metal audio-room structures having the property of sound absorbing; Wooden building structures intended as non-metal audio-room structures having the property of sound diffusing; Wooden building structures intended as non-metal audio-room structures having the property of sound absorbing and diffusing; floorings, namely, construction materials in the nature of non-metal flooring materials, also having sound absorbing and reflecting properties; walls in the nature of prefabricated non-metal walls, non-metal wall panels, and non-metal wall boards, also having sound absorbing and reflecting properties; ceilings in the nature of non-metal ceiling panels and non-metal ceiling boards, also having sound absorbing and reflecting properties; materials for use in the construction of walls, not of metals, namely, non-metal wall panels and non-metal wall boards; coverings for use in the construction of walls, not of metals, namely, prefabricated non-metal wall coverings in the nature of non-metal wall panels and non-metal wall boards; non-metallic minerals for building or construction; ceramic building materials, bricks and refractory products, namely, ceramic building boards and panels, bricks, refractory construction materials; non-metal building materials of ceramic, namely, ceramic building boards and panels; non-metal building materials of plastic, namely, plastic building boards and panels; synthetic materials, namely, non-metal building boards and panels made of synthetic materials, rubber, wood, stone or glass; wall claddings, not of metal, for building; wall linings, not of metal, for building; wall panels, not of metal; building materials made of plastic, namely, plastic building boards and panels; synthetic building materials, namely, non-metal building boards and panels made of synthetic materials; asphalt and materials for building or construction made of asphalt, namely, asphalt building and construction boards and panels; rubber materials for building or construction, namely, rubber building and construction boards and panels; lime materials for building and construction, namely, lime building materials and non-agricultural lime for use in construction; building and construction materials made of plasters, namely, plaster building and construction boards and panels; building materials, namely, semi-worked woods; stones; glass for building Furniture; furniture partitions; byoubu being oriental folding partition screens; meerschaum, raw or partly worked; yellow amber, raw or partly worked; sculptures of plaster; sculptures of plastic; sculptures of wood; bamboo furniture; bamboo skins, unworked or partly worked, for furniture; furniture made from tree bark; Shells, unworked or semi-worked; artificial horns; animal teeth; tortoiseshell, unworked or partly worked; corals, unworked or partly worked
Musical instruments; auxiliary apparatus used for musical
instruments. Building structures of wood having the property of sound
absorbing; building structures of wood having the property
of sound diffusing; building structures of wood having the
property of sound absorbing and diffusing; floorings, walls
and ceilings having property of sound absorbing; floorings,
walls and ceilings having property of sound reflecting;
floorings, walls and ceilings having property of sound
absorbing and reflecting; materials for use in the
construction of walls, not of metals; coverings for use in
the construction of walls, not of metals; non-metallic
minerals for building or construction; ceramic building
materials, bricks and refractory products; building
materials made of linoleum; building materials made of
plastic; synthetic building materials; asphalt and materials
for building or construction made of asphalt; rubber
materials for building or construction; lime materials for
building and construction; building and construction
materials made of plasters; building materials, namely,
semi-worked woods; stones; glass for building. Meerschaum; yellow amber; furniture; furniture partitions;
byoubu [Oriental folding partition screens]; sculptures of
plaster; sculptures of plastic; sculptures of wood; bamboo;
bamboo skins, unworked or partly worked; tree barks; tusks,
unworked or partly worked; whalebones; shells and crusts;
artificial horns; ivory, unworked or partly worked; animal
horns; animal teeth; tortoiseshell, unworked or partly
worked; animal bone, unworked or partly worked; corals,
unworked or partly worked.
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et services
Acoustic insulating materials; Acoustic absorbers used for playing musical instruments and for evaluating and improving the acoustic performance; Acoustic diffusers used for playing musical instruments and for evaluating and improving the acoustic performance; Acoustic absorbing-diffusers used for musical instruments and for evaluating and improving the acoustic performance; all the afore-mentioned goods made of wood, rubber, gutta-percha, gum, asbestos, plastics and resins and substitutes for all these materials.
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et services
Room-tuning mechanisms, namely, architectural acoustic products in the nature of room-tuning decorative display panels composed primarily of non-metal materials which function to control sound; architectural acoustic products, namely, sound absorbers and diffusers; architectural acoustic products, namely, sound absorbers and diffusers in the form of decorative display panels composed primarily of non-metal materials which function to control sound
Provided is a mixing technology with which it is possible to suppress degradation of a low-priority sound and output a more natural mixed sound irrespective of the size or quality of a playback device. This mixing device for mixing a first signal and a second signal on a time-frequency plane has: a control signal generation unit which generates a control signal that indicates whether or not to perform a preferential mixing that includes amplification of the first signal and attenuation of the second signal; and a gain derivation unit which derives, on the basis of the control signal, a first gain to amplify the first signal and a second gain to attenuate the second signal. The control signal at least takes a first value and a second value different from the first value. The first value does not continue beyond a specific bandwidth on the time-frequency axis. When the control signal takes the first value, the mixing device applies the preferential mixing to the first and second signals, whereas in the case when the control signal takes the second value, the mixing device applies simple addition to the first and second signals.
G10L 21/0332 - Détails du traitement à cet effet impliquant la modification des formes d’onde
G10L 21/0364 - Amélioration de l'intelligibilité de la parole, p. ex. réduction de bruit ou annulation d'écho en changeant l’amplitude pour améliorer l'intelligibilité
20.
INFORMATION PROCESSING DEVICE, MIXING DEVICE USING SAME, AND LATENCY REDUCTION METHOD
The present invention reduces latency between signal input and output in an information processing system involving frequency analyses. This information processing device has: a first time-frequency conversion unit which performs time-frequency conversion using a window function having a first width with respect to an input signal; a second time-frequency conversion unit which performs time-frequency conversion on the input signal by using a second window function having a second width that is narrower as compared with the first width; and a change processing unit which makes a change to an output of the second time-frequency conversion unit by using a frequency analysis result based on an output of the first time-frequency conversion unit.
Provided is a mixing technology with which, even when a smart mixing technique is applied to stereo reproduction, it is possible to prevent defects in reproduced sound and to reproduce sounds with natural acoustic quality. This mixing device having stereo output has: a first signal processing unit which mixes a first signal and a second signal in a first channel; a second signal processing unit which mixes a third signal and a fourth signal in a second channel; a third channel which processes a weighted sum of a signal in the first channel and a signal in the second channel; and a gain derivation unit which generates a gain mask that is to be used commonly by the first channel and the second channel, wherein the gain derivation unit derives a first gain to be applied commonly to the first and third signals and a second gain to be applied commonly to the second and fourth signals such that a prescribed condition for gain generation is satisfied at least in the first and second channels simultaneously among the first, second, and third channels.
Musical instruments Wooden building structures intended as non-metal audio-room structures, also featuring materials for sound absorbing; Wooden building structures intended as non-metal audio-room structures, also featuring materials for sound diffusing; Wooden building structures intended as non-metal audio-room structures also featuring materials for sound absorbing and diffusing; floorings, namely, construction materials in the nature of non-metal flooring materials, also having sound absorbing and reflecting properties; walls in the nature of prefabricated non-metal walls, non-metal wall panels, and non-metal wall boards, also having sound absorbing and reflecting properties; and ceilings in the nature of non-metal ceiling panels and non-metal ceiling boards, also having sound absorbing and reflecting properties; materials for use in the construction of walls, not of metals, namely, non-metal wall panels and non-metal wall boards; coverings for use in the construction of walls, not of metals, namely, prefabricated non-metal wall coverings in the nature of non-metal wall panels and non-metal wall boards; non-metallic minerals for building or construction; ceramic building materials, bricks and refractory products, namely, ceramic building boards and panels, bricks, refractory construction materials, not of metal; building materials made of linoleum, namely, linoleum building boards and panels; building materials made of plastic, namely, plastic building boards and panels; synthetic building materials, namely, non-metal building boards and panels made of synthetic materials; asphalt and materials for building or construction made of asphalt, namely, asphalt building and construction boards and panels; rubber materials for building or construction, namely, rubber building and construction boards and panels; lime materials for building and construction, namely, lime building materials and non-agricultural lime for use in construction; building and construction materials made of plasters, namely, plaster building and construction boards and panels; building materials, namely, semi-worked woods; stones; glass for building Meerschaum, raw or partly worked; yellow amber, raw or partly worked; furniture; furniture partitions; byoubu being Oriental folding partition screens; sculptures of plaster; sculptures of plastic; sculptures of wood; bamboo; bamboo skins, unworked or partly worked; tree bark; Shells, unworked or semi-worked; artificial horns; animal teeth; tortoiseshell, unworked or partly worked; corals, unworked or partly worked
23.
LEARNING DATA GENERATION METHOD, LEARNING DATA GENERATION DEVICE AND LEARNING DATA GENERATION PROGRAM
According to the present invention, learning data, which is required for additionally training a learnt model of artificial intelligence to be used for identifying an aircraft, can be efficiently generated. A learning data generation method according to one aspect includes: an acquisition step S10 for acquiring two pieces of data among appearance data of an aircraft on an image obtained by imaging a specific path, signal data of radio waves transmitted from the aircraft on the path, and noise data that indicates a noise from the aircraft on the path; an identification step S20 in which the attributes of the aircraft on the path are identified by inputting one among the two acquired pieces of data to a first identification model for identifying the attributes of an aircraft; and a generation step S30 which generates learning data to be used for learning a second identification model for identifying the attributes of an aircraft by associating the other among the two acquired pieces of data and the attributes of the aircraft on the path, which has been identified in the identification step.
The present invention makes it possible to collect flight history information about every aircraft and to increase the efficiency of collecting aircraft flight history information. The present invention is provided with: an image acquisition unit 11 configured to acquire a captured image G of a route R, A2; an image-based aircraft type identification unit 21 configured to identify the type of an aircraft P on the route R, A2 on the basis of appearance data of an aircraft Q in the image G acquired by the image acquisition unit 11, and on the basis of specified aircraft appearance samples that are pre-associated with aircraft types; and a flight history storage unit 45 configured to store image aircraft type information identified by the image-based aircraft type identification unit 21.
The acoustic performance of acoustic materials is readily studied for various values of the material parameters characteristic of acoustic materials. An acoustic performance calculation device is provided with an acoustic performance calculation device that calculates the acoustic performance of acoustic materials for each of a plurality of values in a pre-specified numerical range for each of a plurality of material parameters characteristic of acoustic materials based on a mathematical model for mathematically representing acoustic material, a contour map drawing device for drawing a contour map representing the calculated acoustic performance by contours where the two axes are the values of one material parameter and the frequency, and a plot drawing device for plotting the performance curves showing the relationship between the frequency and the acoustic performance for one value in the numerical range.
G06G 7/48 - Calculateurs analogiques pour des procédés, des systèmes ou des dispositifs spécifiques, p. ex. simulateurs
G06T 11/20 - Traçage à partir d'éléments de base, p. ex. de lignes ou de cercles
G01H 17/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores non prévue dans les autres groupes de la présente sous-classe
G10K 11/16 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général
09 - Appareils et instruments scientifiques et électriques
Produits et services
Measuring or testing machines and instruments; optical
apparatus and instruments; telecommunication devices and
apparatus; electronic machines, apparatus and their parts.
27.
Reflector structure, sound field adjusting method, columnar reflector structure, room, program, and various acoustic room designing system
There is provided a sound field adjusting method that can provide an acoustic improvement effect tailored to the characteristics of various acoustic rooms, with small differences in reflection properties between sound receiving points. The diameters of a plurality of columnar reflectors are calculated so as to diffuse sound waves of respective different frequency ranges. An arrangement condition is calculated so that the columnar reflectors having the calculated diameters form a plurality of reflecting surfaces that reflect the sound waves of different frequency ranges in random reflection directions, with random reflection time delays, or in random phases. The plurality of columnar reflectors having respective different diameters are then arranged under the arrangement condition. The arrangement condition is calculated to form a reflecting surface for a sound wave of a higher frequency range near a sound source, and form a reflecting surface for a sound wave of a lower frequency range far from the sound source. A sound absorbing structure by using the internal space of the arranged columnar reflectors provides effective countermeasures against low-range standing waves.
09 - Appareils et instruments scientifiques et électriques
Produits et services
[ Measuring or testing machines and instruments and parts thereof, namely, sound level meters and acoustic meters, ] acoustic measuring systems, [ namely, apparatus for recording, transmission and reproduction of sound and visual sound images; electronic machines and parts thereof namely, electroacoustic sound transducers, apparatus and instruments for measuring, controlling, testing, regulating and checking sound and vibration, apparatus for vibration measurement, monitoring and diagnosis, namely, vibration meters, electro-technical vibration meters, ] sound and vibration analyzers, * AND * acoustic analyzers [ electro-acoustic analyzers, structural dynamics analyzers, data acquisition amplifiers, conditioning amplifiers, hand-held vibration analyzers, noise dose meters, noise monitoring terminals, acoustic transducers, microphones, hydrophones, vibration transducers, accelerometers, calibration systems for monitoring and diagnosis of sound volume, quality and frequency and for monitoring and diagnosis of vibration; electrical apparatus and parts thereof for machine monitoring and diagnosis of sound volume, quality, frequency and vibration ]
There is provided a sound source characteristic determining device (10) capable of being applied in an environmental where the type of a sound source is unknown. The device includes a plurality of beamformers (21-1 to 21-M) used when a sound source signal generated from a sound source at an arbitrary position in a space is inputted to a plurality of microphones (14-1 to 14-N), for weighting the acoustic signal detected by each of the microphones by using a function for correcting the difference of the sound source signals generated between the microphones and outputting a totaled signal. Each of the beamformers (21-1 to 21-M) contains a function having a unit directivity characteristic corresponding to one arbitrary direction in the space and is arranged for each of the directions corresponding to an arbitrary position in the space and the unit directivity characteristic. The sound source characteristic determining device (10) further includes means (23) for estimating the position and the direction in the space corresponding to the beamformer outputting a maximum value as the position and the direction of the sound source when the microphone (14) detects a sound source signal.
G01S 3/80 - Radiogoniomètres pour déterminer la direction d'où proviennent des ondes infrasonores, sonores, ultrasonores ou électromagnétiques ou des émissions de particules sans caractéristiques de direction utilisant des ondes ultrasonores, sonores ou infrasonores
