Patent ID: 8663124

Claim:
A method for processing an acoustic signal, comprising the steps of: acquiring an acoustic signal recording body sounds on a respiration monitoring system; isolating noisy portions of the signal based at least in part on cumulative energies and peak energies in the signal with the system, including detecting first noisy portions of the signal based at least in part on cumulative energies in the signal, detecting second noisy portions of the signal based at least part on peak energies in the signal, designating, as third noisy portions, intersections between first noisy portions that envelop second noisy portions and second noisy portions that are enveloped by first noisy portions, and isolating the third noisy portions; detecting an energy envelope for non-noisy portions of the signal with the system; filtering the energy envelope using an adaptive filter with the system; isolating respiration phases in the energy envelope at least in part by identifying trends in the energy envelope with the system; estimating a respiration parameter based at least in part on the respiration phases with the system; and outputting information based at least in part on the respiration parameter estimate on the system.