Patent ID: 8103030
Filing Date: 2012-01-24
Classification: H04R

Abstract:
1. A differential directional microphone system for a hearing aid device, comprising: a first differential directional microphone in a first directional microphone stage having a directional characteristic with a zero point in a first direction; and a further differential directional microphone in a second directional microphone stage connected downstream from the first directional microphone stage having a directional characteristic with a zero point in a second direction oriented opposite to the first direction, wherein the first directional microphone stage comprises a second differential directional microphone that has a directivity essentially corresponding to a directivity of the first differential directional microphone, wherein the further differential directional microphone is connected downstream to the first and the second differential directional microphones, wherein the first directional microphone stage comprises a first microphone, a second microphone and a third microphone, wherein the first differential directional microphone comprises the first and the second microphones and features a first circuit block, wherein the second differential directional microphone comprises the second and the third microphones and features a second circuit block, and wherein the directivity of the second differential directional microphone corresponds to the directivity of the first differential directional microphone.