Patents Assigned to Dyna Magnetic Devices, Inc.
  • Inertial microphone system
    Patent number: 4006318
    Abstract: An inertial-reaction microphone transducer mounting supported on the wearer's head away from the mouth for transmitting speech to the exclusion of ambient. A compliant, radial array of elastomer supporting material presses the transducer gently to the head. The transducer and supporting array may be mounted in a cup covering one ear, or it may be mounted in a capsule having an acoustical labyrinth frequency-selective vent for the neutralization of noise.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: February 1, 1977
    Assignee: Dyna Magnetic Devices, Inc.
    Inventors: George J. Sebesta, Alan Hofer, Richard W. Carlisle