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High sensitivity noise immune stethoscope

  • US 9,078,571 B2
  • Filed: 08/08/2012
  • Issued: 07/14/2015
  • Est. Priority Date: 11/15/2005
  • Status: Active Grant
First Claim
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1. A stethoscope, comprising:

  • a housing;

    a passive system incorporated into the housing, the passive system comprising an acoustic transducer;

    an active system incorporated into the housing, the active system comprising a transmitter and a receiver, wherein the transmitter generates high frequency signals which are reflected from an object thereby creating reflected high frequency signals having a frequency shift dependent on the motion of the object, and wherein the receiver detects the reflected high frequency signals and converts the high frequency signal into an electrical signal; and

    a switch in communication with the passive system and the active system, the switch able to select the passive system or active system.

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