Patent ID: 7079662

Claim:
A hearing aid device wearable in the ear or hearing aid device having an otoplastic wearable in the ear, comprising: a microphone configured to acquire an acoustic input signal at an acoustic input and convert it into an electrical signal; an earphone configured to convert a processed electrical signal into an acoustic output signal; an aeration channel comprising: a proximal opening on an end closer to an eardrum that receives a part of the earphone acoustic output signal; and a distal opening that transmits the part of the earphone acoustic output signal to the acoustic input; the aeration channel being subdivided into at least a first proximal sub-region comprising the proximal opening and a second distal sub-region comprising the distal opening, the first proximal sub-region that is proximal when the hearing aid device is worn or the otoplastic is worn comprising a first cross-sectional area and a first length, and the second distal sub-region comprises a shorter length and a larger cross-sectional area compared to the first sub-region.