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Adaptive Acoustic Signal Filtering for Respiration Monitoring System

  • US 20140135639A1
  • Filed: 11/13/2012
  • Published: 05/15/2014
  • Est. Priority Date: 11/13/2012
  • Status: Abandoned Application
First Claim
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1. An adaptive acoustic signal filter for a respiration monitoring system, comprising:

  • a filter stage configured to apply a cutoff frequency to an input acoustic signal waveform containing respiration and heart sounds in a filtering operation to produce a filtered acoustic signal waveform from which heart sounds have been removed; and

    a cutoff frequency adapter operatively coupled with the filter stage and configured to perform one or more cutoff frequency optimization tests on the filtered signal, determine from the tests whether adjustment of the cutoff frequency is indicated and selectively adjust the cutoff frequency and provide the adjusted cutoff frequency to the filter stage for application in a next filtering operation performed on the input signal waveform depending on whether adjustment of the cutoff frequency is indicated.

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