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Protection against sound piracy by microphones

  • US 20070192091A1
  • Filed: 06/30/2006
  • Published: 08/16/2007
  • Est. Priority Date: 07/01/2005
  • Status: Abandoned Application
First Claim
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1. A method for protecting against microphone audio piracy, comprising:

  • (a) providing a first audio signal to be protected, having a range of audio frequencies within the range of human hearing;

    (b) providing a second acoustical signal having a second frequency above the range of human hearing, wherein the frequency above the range of human hearing is greater than about ½

    of the sampling rate of said microphone.

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