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Heart sound sensor

  • US 4,672,976 A
  • Filed: 06/10/1986
  • Issued: 06/16/1987
  • Est. Priority Date: 06/10/1986
  • Status: Expired due to Fees
First Claim
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1. A bio-acoustic signal sensing device for placement on the body of a patient to detect low frequency bio-acoustical signals and being for use with medical diagnostic devices, comprising:

  • a. a housing structure retaining the remaining elements of the device and having securement means for holding the device to the body of the patient, said housing structure having an open end for sound wave reception and a fluid ingress/egress aperture said open end having a horizontal dimension of at least 5 cm.;

    b. hydrophone means spacially fixed within said housing structure for producing electrical signals in response to transmitted bio-acoustic signals;

    c. flexible diaphragm means extended across said open end of said housing structure and having retention means to fix it thereacross, said diaphragm means being for placement in direct contact with the patient body surface, for conforming to the contours of the patient body surface and being vibratingly sensitive to the sound waves generated in the patient'"'"'s body;

    d. a bubble free fluid gel medium filling the remaining interior volume of said housing structure, said fluid medium transmitting sound waves from said diaphragm means to said hydrophone means; and

    e. cable means communicatively connected to said hydrophone means for transmitting electrical signals from said hydrophone means to medical diagnostic devices.

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