Patent ID: 6134334
Filing Date: 2000-10-17
Classification: H04R

Abstract:
A directional microphone for an in-the-ear hearing aid, comprising:A. a directional microphone cartridge comprising a directional microphone cartridge housing and a diaphragm mounted within said directional microphone cartridge housing, said directional microphone cartridge housing having a pair of opposed walls, said diaphragm being oriented generally parallel to said pair of opposed walls and dividing said directional microphone cartridge housing into a front chamber and a rear chamber;B. a front sound passage communicating with said front chamber, said front sound passage having a front sound inlet; andC. 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.