Directional microphone assembly

  • US 6,567,526 B1
  • Filed: 10/13/2000
  • Issued: 05/20/2003
  • Est. Priority Date: 12/31/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. An in-the-ear hearing aid comprising:

  • A. a hearing aid housing; and

    B. a directional microphone comprising (i) a directional microphone cartridge having a directional microphone cartridge housing and a diaphragm mounted within said directional microphone cartridge housing, said diaphragm dividing said directional microphone cartridge housing into a front chamber and a rear chamber;

    (ii) a front sound passage communicating with said front chamber, said front sound passage having a front sound inlet; and

    (iii) a rear sound passage communicating with said rear chamber, said rear sound passage having a rear sound inlet, said front and rear sound inlets being spaced apart a distance of less than 0.25 inches.

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