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Architectural sound enhancement with pre-filtered masking sound

  • US 20030144848A1
  • Filed: 03/28/2002
  • Published: 07/31/2003
  • Est. Priority Date: 01/31/2002
  • Status: Active Grant
First Claim
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1. A method of producing masking sound within a space for masking distracting noise and providing enhanced speech privacy within the space, said method comprising the steps of:

  • (a) providing at least one transducer arranged to project sound directly into the space;

    (b) determining a desired spectrum for masking sound to be produced within the space;

    (c) producing a first noise signal;

    (d) subjecting the first noise signal to a pre-filter having substantially the same spectrum as the desired spectrum determined in step (b) to produce a first masking signal;

    (e) amplifying the first masking signal; and

    (f) driving the at least one transducer with the amplified first masking signal to produce within the space a first masking sound having substantially the desired spectrum determined in step (b).

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