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Spatial selectivity noise reduction tradeoff for multi-microphone systems

  • US 8,606,571 B1
  • Filed: 07/15/2010
  • Issued: 12/10/2013
  • Est. Priority Date: 04/19/2010
  • Status: Active Grant
First Claim
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1. A method for controlling adaptivity of noise reduction in an acoustic signal, the method comprising:

  • receiving a primary acoustic signal at a first microphone and a secondary acoustic signal at a second microphone;

    determining a spatial coefficient based on a difference between the primary and secondary acoustic signals, the spatial coefficient indicating a positional orientation of the first and second microphones relative to a speech source; and

    reducing an energy level of a noise component in the primary acoustic signal based on the spatial coefficient when the spatial coefficient satisfies a configurable threshold.

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