×

Electronic stethoscope

  • US 5,557,681 A
  • Filed: 09/24/1993
  • Issued: 09/17/1996
  • Est. Priority Date: 09/24/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. An electronic stethoscope comprising:

  • a microphone;

    an active filter coupled to said microphone, said active filter having a center frequency continuously variable within the range of 1 hz to 1500 hz and a bandwidth continuously variable between 1 hz and 3000 hz, wherein said center frequency and said bandwidth are varied indedendently of each other;

    an amplifier coupled to said active filter; and

    an inverse filter coupled to said amplifier, said inverse filter having a frequency response which is the inverse of the frequency response of the human ear.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×