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METHOD AND APPARATUS TO CREATE A SOUND FIELD

  • US 20090161880A1
  • Filed: 02/24/2009
  • Published: 06/25/2009
  • Est. Priority Date: 03/27/2001
  • Status: Abandoned Application
First Claim
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1. A method of creating a sound field using an array of output transducers, said array comprising first transducers spanning a first portion of said array and second transducers spanning a second portion of said array smaller than said first portion, said method comprising:

  • dividing an input signal into at least a low frequency component and a high frequency component;

    using said first portion of the array to output said low frequency component;

    selecting a delay value for transducers of said array in at least said second portion; and

    using said second portion of said array to output said high frequency component, wherein said high frequency component for each transducer is delayed by said respective delay value;

    whereby a beam of at least high frequency sound is directed in a particular direction.

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