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Substantially planate parametric emitter and associated methods

  • US 8,983,098 B2
  • Filed: 03/13/2013
  • Issued: 03/17/2015
  • Est. Priority Date: 08/14/2012
  • Status: Active Grant
First Claim
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1. A parametric speaker, comprising:

  • a substantially rigid, planate radiating element, suitable for radiating ultrasonic vibrations into a nonlinear medium, the planate radiating element comprising a continuous sheet of material devoid of openings;

    an emitter, having an output frequency that is in the ultrasonic audio range, the emitter being intimately coupled in direct contact with the radiating element; and

    a signal processing system, electronically coupled to the emitter, the signal processing system operable to deliver to the emitter a modulated ultrasonic signal;

    whereinthe radiating element is physically configured to have a mechanical resonance that substantially matches the output frequency of the emitter.

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