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Heart sound simulator

  • US 9,986,952 B2
  • Filed: 03/10/2014
  • Issued: 06/05/2018
  • Est. Priority Date: 03/14/2013
  • Status: Active Grant
First Claim
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1. A heart sound simulator configured to determine heart sounds from photo-plethysmograph data, the heart sound simulator comprising:

  • an optical sensor configured to detect an attenuation of light by body tissue, the optical sensor being further configured to generate a signal based on the detected attenuation, said optical sensor including a light source and light detector;

    a processor configured to receive the generated signal, said processor configured to;

    process the received signal to determine a plurality of plethysmograph waveforms,analyze the plurality of plethysmograph waveforms to determine a subset of the plurality of plethysmograph waveforms that have a first waveform characteristic, wherein a plethysmograph waveform in the plurality of plethysmograph waveforms that has the first waveform characteristic is more appropriate for generating audio output than another plethysmograph waveform in the plurality of plethysmograph waveforms that does not have the first waveform characteristic, andoutput a heart sound signal based on the subset of the plurality of plethysmograph waveforms;

    a noise generator configured to generate white noise; and

    a filter configured to filter the white noise to form filtered noise that represents one or more heart tones, andwherein the processor is further configured to combine the heart sound signal and the filtered noise to generate a heart sound output.

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