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Controlling perceived sound source direction

  • US 4,393,270 A
  • Filed: 05/28/1980
  • Issued: 07/12/1983
  • Est. Priority Date: 11/28/1977
  • Status: Expired due to Term
First Claim
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1. A method of generating and processing electrical signals indicative of sound so that upon conversion of such signals into sounds and audition of such sounds by a normal human listener, such listener will perceive such sounds as emanating in preselected directions of perception from the listener, said method comprising the steps of:

  • (a) generating a plurality of signals each respectively from one of a plurality of directional microphones, each such microphone being predominantly responsive to sounds impinging on it in a unique one of a plurality of preselected directions of reception; and

    (b) separately modulating each said electrical signal with a unique modulating signal indicative of a different one of said preselected directions of perception so that during such modulation different amplitude adjustments will be applied to different components of said signal, such adjustments varying with frequency in a manner corresponding to the variation of amplitude response with frequency of the normal human auditory system for sounds impinging on a listener from such one direction.

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