Feature characterization for breathing monitor
First Claim
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1. A method of monitoring respiratory activity comprising:
- sensing a sound signal generated by a living human or animal body using a detector;
separating the sound signal into more than two frequency bands using a processing apparatus;
identifying a start point or an end point of an inspiration or expiration breath candidate by detecting as a feature of the sound signal a minimum or turning point, or based on a previous end point or start point using the processing apparatus;
identifying a segment of the sound signal as a breath candidate based on the identified start point or end point using the processing apparatus;
analyzing the segment of the sound signal identified as a breath candidate to detect an actual breath inspiration or expiration event using the processing apparatus; and
taking one or more of the following actions;
triggering an alarm or warning based on a timing of the actual breath inspiration or expiration event;
orpresenting a classification of the actual breath inspiration or expiration event in a visual, numeric, or auditory display.
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Abstract
A method of identifying a breath comprises sensing a signal generated by a living human or animal body and separating the signal into a plurality of frequency bands to identify a breath candidate.
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Citations
23 Claims
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1. A method of monitoring respiratory activity comprising:
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sensing a sound signal generated by a living human or animal body using a detector; separating the sound signal into more than two frequency bands using a processing apparatus; identifying a start point or an end point of an inspiration or expiration breath candidate by detecting as a feature of the sound signal a minimum or turning point, or based on a previous end point or start point using the processing apparatus; identifying a segment of the sound signal as a breath candidate based on the identified start point or end point using the processing apparatus; analyzing the segment of the sound signal identified as a breath candidate to detect an actual breath inspiration or expiration event using the processing apparatus; and taking one or more of the following actions; triggering an alarm or warning based on a timing of the actual breath inspiration or expiration event;
orpresenting a classification of the actual breath inspiration or expiration event in a visual, numeric, or auditory display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification