×

Acoustic respiratory monitoring sensor having multiple sensing elements

  • US 9,538,980 B2
  • Filed: 04/07/2014
  • Issued: 01/10/2017
  • Est. Priority Date: 10/15/2009
  • Status: Active Grant
First Claim
Patent Images

1. An acoustic sensor comprising:

  • a sensor support at least partially defining an acoustic cavity;

    first and second piezoelectric films each including respective first and second electrodes and each stretched from a first side of the acoustic cavity to a second side of the acoustic cavity opposing the first side; and

    a noise attenuator coupled to the first electrode of the first piezoelectric film and the first electrode of the second piezoelectric film, the second electrode of the first piezoelectric film and the second electrode of the second piezoelectric film coupled to a common potential, the noise attenuator configured to at least;

    at least partially constructively combine a physiological signal component of a first signal output by the first piezoelectric film and a physiological signal component of a second signal output by the second piezoelectric film; and

    at least partially destructively combine an acoustic noise component of the first signal output by the first piezoelectric film an acoustic noise component of the second signal output by the second piezoelectric film.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×