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FM theta-inducing audible sound, and method, device and recorded medium to generate the same

  • US 5,954,630 A
  • Filed: 09/14/1994
  • Issued: 09/21/1999
  • Est. Priority Date: 09/16/1993
  • Status: Expired due to Fees
First Claim
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1. A method to generate Fm theta-inducing audible sound which contains a modulated wave where a very low-frequency wave of about 20 hertz or lower is superposed on an audio frequency wave, which comprises:

  • generating the audio frequency wave with a modulated wave-generating circuitry;

    generating the very low-frequency wave with the modulated wave-generating circuitry;

    amplitude-modulating the audio frequency wave with the very low-frequency wave in the modulated wave-generating circuitry, to obtain a modulated wave where the very low-frequency wave is superposed on the audio frequency wave, and subjecting the modulated wave to electroacoustic transduction.

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