Patents Assigned to ACR Electronics
  • Ear microphone
    Patent number: 4696045
    Abstract: An ear microphone includes a bimorph piezoelectric transducer mounted on a PC board having an amplifier therein and surrounded by a helically wound spring. The piezoelectric transducer and spring are potted in a semi-soft potting compound which is formed in a shape adapted to be inserted into an external auditory ear canal to permit bone conduction to the microphone element. A cable is coupled to the amplifier through which a signal can be withdrawn for processing by electronic equipment.
    Type: Grant
    Filed: June 4, 1985
    Date of Patent: September 22, 1987
    Assignee: ACR Electronics
    Inventor: James M. Rosenthal