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Microphone noise rejection system

  • US 6,072,881 A
  • Filed: 06/09/1997
  • Issued: 06/06/2000
  • Est. Priority Date: 07/08/1996
  • Status: Expired due to Fees
First Claim
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1. A method of rejecting repetitive noise introduced into an information signal, comprising the steps of:

  • receiving from a first source a repetitive noise signal;

    identifying a characteristic frequency of the repetitive noise signal received from the first source;

    receiving from a second source that is distinct from the first source an information signal having an information component and a repetitive noise component originating from the first source;

    delaying the information signal for a period of time based on the identified characteristic frequency of the repetitive noise signal to form a phase-shifted or delayed information signal; and

    processing the delayed information signal with a non-delayed information signal received from the second source to form a processed information signal in which the information component is substantial and the noise component is negligible.

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