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Image derived directional microphones

  • US 4,965,775 A
  • Filed: 05/19/1989
  • Issued: 10/23/1990
  • Est. Priority Date: 05/19/1989
  • Status: Expired due to Term
First Claim
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1. An acoustic sensor arrangement, which comprises:

  • a directional acoustic sensor unit having first-order gradient characteristicsan acoustically reflecting surfacesaid sensor unit being positioned relative to said reflecting surface whereby the acoustic interaction between said sensor unit and said surface causes the output of said sensor unit to have a second-order gradient response pattern.

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