MULTISTAGE SYSTEM AND METHOD FOR ESTIMATING RESPIRATION PARAMETERS FROM ACOUSTIC SIGNAL

摘要

A multistage system for estimating respiration parameters from an acoustic signal. The system comprises a sound capture system adapted to acquire an acoustic signal recording body sounds; an acoustic signal processing system adapted to receive from the sound capture system the signal, isolate noisy portions of the signal based at least in part on cumulative energies and peak energies in the signal, detect an energy envelope for non-noisy portions of the signal, filter the energy envelope using an adaptive filter, isolate respiration phases in the energy envelope at least in part by identifying trends in the energy envelope and estimate a respiration parameter based at least in part on the respiration phases; and a respiration data output system adapted to output information based at least in part on the respiration parameter estimate.