PHYSIOLOGICAL ACOUSTIC MONITORING SYSTEM

摘要

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.

主权项

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.