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Disposable acoustic pad sensors

  • US 5,885,222 A
  • Filed: 02/19/1997
  • Issued: 03/23/1999
  • Est. Priority Date: 08/30/1993
  • Status: Expired due to Term
First Claim
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1. An acoustic sensor for capturing sounds produced within a body, the sensor comprising:

  • a pad having a desired surface area;

    said pad being adapted to be mechanically and acoustically coupled over substantially all of said surface area to a portion of a patient'"'"'s skin;

    said pad sensing flexure of said skin in response to sound produced within a patient'"'"'s body and having a flexure rigidity adjusted to the mechanical impedance of skin tissue;

    said pad having a spaced apart first and second piezoelectric portions for sensing said flexure and for converting said sensed flexure into electrical signals; and

    said first and second piezoelectric sensing portions being spaced apart a distance which creates a maximum voltage signal in said sensing portions.

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