PHYSIOLOGICAL ACOUSTIC MONITORING SYSTEM
First Claim
1. An acoustic monitoring system inputs an acoustic sensor signal responsive to tracheal sounds of a person and generates breath tags and a respiration rate, the breath tags representing the acoustic envelope of the tracheal sounds and the respiration rate representing the inverse period of the acoustic envelope, the breath tags and respiration rate having a sufficiently low bandwidth to share a data channel with other physiological parameters, the acoustic monitor comprising:
- an acoustic sensor input;
an A/D converter that digitizes the sensor input and outputs a digitized sensor signal;
a decimation filter and mixer that reduces the data rate of the digitized sensor signal and outputs a digitized raw audio; and
an acoustic parameter processor that generates a respiration rate and breath tags in response to the digitized raw audio.
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Accused Products
Abstract
A physiological acoustic monitoring system receives physiological data from an acoustic sensor, down-samples the data to generate raw audio of breathing sounds and compresses the raw audio. The acoustic monitoring system has an acoustic sensor signal responsive to tracheal sounds in a person. An A/D converter is responsive to the sensor signal so as to generate breathing sound data. A decimation filter and mixer down-samples the breathing sound data to raw audio data. A coder/compressor generates compressed audio data from the raw audio data. A decoder/decompressor decodes and decompresses the compressed audio data into decompressed audio data. The decompressed audio data is utilized to generate respiration-related parameters in real-time. The compressed audio data is stored and retrieved so as to generate respiration-related parameters in non-real-time. The real-time and non-real-time parameters are compared to verify matching results across multiple monitors.
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Citations
20 Claims
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1. An acoustic monitoring system inputs an acoustic sensor signal responsive to tracheal sounds of a person and generates breath tags and a respiration rate, the breath tags representing the acoustic envelope of the tracheal sounds and the respiration rate representing the inverse period of the acoustic envelope, the breath tags and respiration rate having a sufficiently low bandwidth to share a data channel with other physiological parameters, the acoustic monitor comprising:
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an acoustic sensor input; an A/D converter that digitizes the sensor input and outputs a digitized sensor signal; a decimation filter and mixer that reduces the data rate of the digitized sensor signal and outputs a digitized raw audio; and an acoustic parameter processor that generates a respiration rate and breath tags in response to the digitized raw audio. - View Dependent Claims (2, 3, 4, 5)
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6. An acoustic monitoring method comprising:
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inputting a sensor signal responsive to respiratory sounds of a living being; digitizing the sensor signal so as to generate acoustic data; extracting an envelope from the acoustic data; defining an idealized envelope from the extracted envelope; describing the idealized envelope as a plurality of breath tags; and transmitting the breath tags over a data channel. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. An acoustic monitor comprising:
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a sensor signal responsive to respiratory sounds of a living being; an A/D converter that digitizes the sensor signal into acoustic data; and a parameter generator that extracts a respiratory sound envelope from the acoustic data so as to generate a breath tag, the breath tag transmitted over a data channel as a representation of the respiratory sounds. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification