Interior rearview mirror sound processing system

  • US 6,420,975 B1
  • Filed: 12/17/1999
  • Issued: 07/16/2002
  • Est. Priority Date: 08/25/1999
  • Status: Expired due to Term
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First Claim
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1. An interior rearview mirror digital sound processing system suitable for use in a vehicle equipped with an audio system comprising:

  • an interior rearview mirror assembly, said mirror assembly comprising a mirror housing including a reflective element;

    said interior mirror assembly including a microphone module capable of producing an audio output in response to detection of vocal input with vehicle cabin noise superimposed thereon, said microphone module comprising first and second microphones, said first microphone having a first zone of principal sensitivity directed generally in the direction of a windshield of the vehicle when said interior mirror assembly is mounted to a vehicle, said second microphone having a second zone of principal sensitivity directed in a direction that is different from that of said first zone of principal sensitivity, said second zone of principal sensitivity being directed generally toward at least the driver of the vehicle;

    said assembly further including a digital sound processor;

    said digital sound processor receiving a signal indicative of said audio output of said microphone module; and

    said digital signal processor processing said signal indicative of said audio output and providing an output vocal signal with reduced vehicle cabin noise.

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