Patent ID: 7860263

Claim:
A hearing device comprising: an ear fitting piece adapted for insertion into an auditory canal, said ear fitting piece having a tube therein that proceeds into the auditory canal when said ear fitting piece is inserted in the auditory canal; a speaker disposed in said ear fitting piece, said speaker emitting an audio signal into said tube; a first microphone and at least one second microphone disposed acoustically-symmetrically relative to said speaker in said ear fitting piece when said ear fitting piece is inserted in the auditory canal, said first and second microphones respectively detecting sound in said tube at acoustically symmetrical locations relative to said speaker; a microphone matching unit connected to said first and second microphones to receive microphone signals therefrom, and that detects a difference between the respective microphone signals; a signal processing unit connected to said speaker that supplies a processed signal to said speaker for emission by said speaker as said audio signal; and said microphone matching unit being connected between said first and second microphones and said signal processing unit and supplying only components of the respective microphone signals that were acquired differently by the respective first and second microphones at a any one point in time to said signal processing unit for processing therein to form said processed signal.