Abstract

A method for determining respiratory phases in an acoustic signal which represents an individual's respiratory activity. The respiratory activity includes inhalation and exhalation phases. The method includes: detecting pause intervals in the acoustic signal; and determining time intervals corresponding to inhalation phases each between a long pause and a short pause, and time intervals corresponding to exhalation phases each between a short pause and a long pause.

IPC Classes  ?

• A61B 7/00 - Instruments for auscultation
• A61B 5/00 - Measuring for diagnostic purposes Identification of persons
• G06N 20/00 - Machine learning

Abstract

The present invention relates to a method for determining respiratory phases in an acoustic signal which represents an individual's respiratory activity, the respiratory activity comprising inhalation and exhalation phases. The method is such that it comprises the following steps: detecting (S2) pause intervals in the acoustic signal; determining (S4) time intervals corresponding to inhalation phases each between a long pause and a short pause, and time intervals corresponding to exhalation phases each between a short pause and a long pause.

IPC Classes  ?

• A61B 7/00 - Instruments for auscultation

Abstract

A method is proposed for determining a pulse rate through a sound-sensing means placed on an individual's trachea, the method comprising a preliminary step for recording sound signals for a lengthy duration, wherein it comprises subsequently the following steps: filtering digital signals representative of the sound signals by using an adaptive filter, applying a lowpass filter to the signals obtained in order to select the signals comprised in a specified passband, selecting a first temporal portion of filtered digital signals of a specified duration, intercorrelation with a temporal portion of filtered digital signals that follows the first temporal portion in time and is of a same duration, searching (4.6) for the intercorrelation, computing the time interval corresponding to this temporal position and computing the corresponding pulse rate throughout the recording duration, to obtain a temporal series of pulse rates S1.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes Identification of persons
• A61B 5/285 - Endotracheal, oesophageal or gastric probes

Goods & Services

Scientific measuring, signaling and checking (supervision) apparatus and instruments; sound transmitting apparatus; image transmission apparatus; image reproduction apparatus; sound reproduction apparatus; image recording apparatus; sound recording apparatus; image recording apparatus; sound recording apparatus; equipment for data processing, software, all in the field of measurement of sleep phases and sleep apnea; all these goods are exclusively intended for hospitals, clinics and healthcare professionals. Apparatus and instruments for medical use; apparatus and instruments for medical use for collecting, monitoring, displaying graphical or other data, including plotters and display screens for measuring and representing brain activity and sleep states; measuring apparatus for medical diagnostic use; artificial sleep apparatus for medical use; all these goods are exclusively intended for hospitals, clinics and healthcare professionals.

Abstract

15
ABSTRACT
System and method for determining a pulse rate by predictive filtering and
intercorrelation
of sounds sensed in an individual's trachea.
A method is proposed for determining a pulse rate through a sound-sensing
means placed on
an individual's trachea, the method comprising a preliminary step for
recording sound signals
for a lengthy duration, wherein it comprises subsequently the following steps:
filtering digital
signals representative of the sound signals by using an adaptive filter,
applying a lowpass filter
to the signals obtained in order to select the signals comprised in a
specified passband,
selecting a first temporal portion of filtered digital signals of a specified
duration,
intercorrelation with a temporal portion of filtered digital signals that
follows the first
temporal portion in time and is of a same duration, searching (4.6) for the
intercorrelation,
computing the time interval corresponding to this temporal position and
computing the
corresponding pulse rate throughout the recording duration, to obtain a
temporal series of
pulse rates sl..
Abstract figure = figure 4
Date Recue/Date Received 2021-01-22

IPC Classes  ?

• A61B 5/024 - Measuring pulse rate or heart rate
• A61B 5/08 - Measuring devices for evaluating the respiratory organs
• A61B 7/00 - Instruments for auscultation
• A61F 5/56 - Devices for preventing snoring
• H04R 1/14 - Throat mountings for microphones