×

Acoustic sensor and acoustic sensor system

  • US 9,581,571 B2
  • Filed: 08/21/2014
  • Issued: 02/28/2017
  • Est. Priority Date: 09/20/2013
  • Status: Active Grant
First Claim
Patent Images

1. An acoustic sensor comprising:

  • a base including a support and a first film unit supported by the support, the first film unit being flexible; and

    a first strain sensing element provided on a first surface of the first film unit, the first strain sensing element including a first magnetic layer, a second magnetic layer, and a first intermediate layer provided between the first magnetic layer and the second magnetic layer, an acoustic wave being transmitted to the first film unit via a first transmitting material, the first transmitting material being in contact with the first film unit, an electric resistance between the first magnetic layer and the second magnetic layer being variable in accordance with the acoustic wave.

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