Patent ID: 6766031
Filing Date: 2004-07-20
Classification: H04R

Abstract:
A hearing aid for arrangement in the ear, comprising a plug for arrangement in the ear canal, said plug having a shell-like wall for facing the interior of the ear canal with an orifice at a part of said wall adapted for facing the ear canal, and a faceplate fastened to said wall, said wall and said faceplate together defining a hearing aid with a generally closed cavity, an input transducer for transforming external sounds into an electrical signal, a signal processor for processing the signal produced by the input transducer for producing a hearing-loss compensating electrical signal, an output transducer for transforming the signal from the signal processor into a hearing-loss compensating sound signal, a power source, and a tube piece provided between said orifice and said cavity, wherein said input transducer, said signal processor, said output transducer and said power source are arranged inside said cavity so as to occupy part of said cavity while leaving a cavity residual volume, and wherein said cavity and tube piece are tuned to provide an acoustical circuit having a resonance frequency in the region of the first voice sound formants of the user.