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Heart-activity sound monitoring

  • US 8,348,852 B2
  • Filed: 11/25/2008
  • Issued: 01/08/2013
  • Est. Priority Date: 03/06/2008
  • Status: Active Grant
First Claim
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1. A method for acquiring, externally or internally, a subject'"'"'s anatomical S1, S2, S3, S4 heart-sound information useful in performing a cardio investigation and in producing a related utility output involving that subject comprisingplacing an acoustic sensor on or within the subject'"'"'s anatomy at a selected anatomical, the acoustic sensor comprising an acoustical-to-electrical-output transducer specifically having a known, nominal, mechanical resonance frequency which lies within the known range of the S1, S2, S3, S4 heart-sound frequencies, and being capable of providing a sensor electrical output,using a wave generator having a wave generator electrical output, stimulating the transducer at a frequency which is close to its known, nominal, mechanical resonance frequency,coupling to a frequency comparator the electrical outputs of the transducer and of the wave generator,observing over time any time-based differences which exist between the two, thus-compared outputs,interpreting such observed differences as being representations of the subject'"'"'s S1, S2, S3, S4 heart sounds, andfrom such interpreted differences, producing a utility output associated with the subject.

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