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Method and apparatus for a magnetically induced speaker diaphragm

  • US 6,108,433 A
  • Filed: 01/13/1998
  • Issued: 08/22/2000
  • Est. Priority Date: 01/13/1998
  • Status: Expired due to Fees
First Claim
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1. An ultrasonic emitter device having broad frequency range capacity with relatively large diaphragm displacement compared to typical electrostatic diaphragm movement, said device, comprising:

  • a core member containing means for establishing a variable magnetic field adjacent the core member;

    a movable diaphragm disposed in tension along the core member and displaced a short separation distance from the core member to allow an intended range of orthogonal displacement of the diaphragm with respect to the core member and within a strong portion of the variable magnetic field; and

    at least one conductive ring disposed on the movable diaphragm for enabling inductively induced current flow in an orientation which develops a counter, opposing magnetic force which is repelled by the variable magnetic field of the core member at a desired frequency for development of a series of compression waves which may be adjusted to include an ultrasonic frequency range.

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