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Parametric ring emitter

  • US 7,088,830 B2
  • Filed: 03/18/2002
  • Issued: 08/08/2006
  • Est. Priority Date: 04/30/1997
  • Status: Expired due to Fees
First Claim
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1. A parametric speaker sound emitting device for providing at least one new sonic frequency as a by-product of emitting at least two ultrasonic frequencies from an ultrasonic frequency emitter, comprising:

  • an emitting perimeter of ultrasonic emitting material having an outer radius and an inner radius respectively surrounding an interior open space,wherein a ratio of (i) a difference between the inner radius and the outer radius of the emitting perimeter to (ii) the outer radius of the emitting perimeter is within a numerical range of 0.1 to 1.0.

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