HEARING AID DEVICE WITH IN-THE-EAR-CANAL MICROPHONE

摘要

A hearing aid device is disclosed. The hearing aid device comprises a receiver configured to be arranged in the ear canal. The hearing aid device comprises a directional microphone system comprising two microphones or one microphone having two sound inlets. The hearing aid device comprises means for counteracting acoustic feedback on the basis of sound signals detected by the two microphones or the two sound inlets. The hearing aid device comprises an “open fitting” providing ventilation. The two microphones or the two sound inlets of the directional microphone (forming part of a directional system) are arranged in the ear canal at the same side of the receiver and sound is allowed to propagate freely between the microphones or between the inlets of the directional microphone and the receiver. Preferably, the hearing aid device comprises a procedure (such as an adaptive procedure) for optimising the directional system of the hearing aid device. An improved feedback reduction is thereby achieved, while allowing a relatively large gain to be applied to the incoming signal.

主权项

1. A hearing aid device comprising a receiver configured to be arranged in the ear canal, where the hearing aid device comprises a directional microphone comprising two microphones, termed a front and a rear microphone, respectively, or one microphone having two sound inlets, termed a front and a rear sound inlet, respectively, where the hearing aid device comprises a feedback suppression system for counteracting acoustic feedback on the basis of sound signals detected by the directional microphone, where the hearing aid device comprises an open fitting providing ventilation, wherein
the two microphones or the two different sound inlets of the directional microphone are arranged in the ear canal at the same side of the receiver and that sound is allowed to propagate between the microphones or between the inlets of the directional microphone and the receiver; the hearing aid device comprises a mould or housing provided with the front microphone and the rear microphone, where the mould or housing is configured to be inserted into the ear canal in such a way that the receiver or the sound outlet of the receiver is arranged closer to the eardrum than the rear microphone or the rear sound inlet, and that the rear microphone or the rear sound inlet, is arranged between the receiver and the front microphone or the front sound inlet; and the microphones or sound inlets are configured to provide that the acoustic feedback received at the rear microphone or the rear sound inlet exceeds the acoustic feedback received at the front microphone or the front sound inlet by at least 3 dB, when the hearing aid device is arranged in a normal ear canal.