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Biophysical sensor

  • US 6,988,993 B2
  • Filed: 06/20/2001
  • Issued: 01/24/2006
  • Est. Priority Date: 06/22/2000
  • Status: Expired due to Term
First Claim
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1. A biophysical sensor including a sound vibration sensing element using a PVDF membrane to produce a sensed output, and at least two separate signal processing paths to process the sensed output to produce at least two output signals;

  • where one signal processing path includes an operational amplifier (OP Amp) connected to the PVDF membrane and for amplifying an audible frequency range of the sensed output to an audible amplitude range, and a unity gain buffer amplifier is connected to the output of the OP Amp to allow connection of headphones directly to the sensor output.

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