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Parametric audio system

  • US 20050248233A1
  • Filed: 07/13/2005
  • Published: 11/10/2005
  • Est. Priority Date: 07/16/1998
  • Status: Active Grant
First Claim
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1. A parametric audio generator comprising:

  • (a) an ultrasonic signal source providing a carrier;

    (b) a source of audio signals;

    (c) means for modulating the carrier with the audio signals, the frequency of the carrier being sufficiently high that all of the components of the modulated carrier have frequency above the range in which the human auditory system responds;

    (d) an ultrasonic transducer for radiating ultrasonic signals; and

    (e) means for applying the modulated carrier to the transducer.

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