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Dental stethoscope

  • US 4,302,627 A
  • Filed: 04/28/1980
  • Issued: 11/24/1981
  • Est. Priority Date: 08/09/1979
  • Status: Expired due to Term
First Claim
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1. A dental stethoscope characterized in that a measurement channel oscillator and a reference channel oscillator are provided in combination, a measurement probe and a mouth mucose lead element are respectively connected to said measurement channel oscillator, while at least one of equivalent circuits each consisting of an equivalent capacitor and an equivalent resistor connected in parallel to each other is selectively connected to said reference channel oscillator, said respective equivalent circuits corresponding to different stages of a decayed tooth, and the outputs of said measurement channel oscillator and said reference channel oscillator are respectively connected to the respective channels of a stereo head-phone.

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