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Automated Diagnosis-Assisting Medical Devices

  • US 20140276133A1
  • Filed: 04/03/2014
  • Published: 09/18/2014
  • Est. Priority Date: 03/15/2013
  • Status: Abandoned Application
First Claim
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1. A system for processing a quasi-periodic signal, the system comprising:

  • an electronic stethoscope producing a quasi-periodic signal;

    a processor; and

    a memory device with stored instructions that, when executed by the processor, cause the system to;

    receive a representation of the quasi-periodic signal,remove a DC component from the received representation of the quasi-periodic signal to produce a purely time-varying signal,filter, the time-varying signal to produce a pre-processed signal,auto-correlate, at least a portion of a representation of the pre-processed signal with itself,store a corresponding auto-correlation output for the at least portion of the representation of the pre-processed signal,apply a biphasic tapering function to the auto-correlation output, the tapering function including a time constant parameter that is a function of the quasi-periodic signal and producing a first maximum, andstore in the memory device a representation, based on the first maximum, as an indication of a rate or a frequency of the quasi-periodic signal.

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