Patent ID: 7574012

Claim:
A hearing aid comprising: an estimating device, supplied with an input signal disturbed by interference, that estimates a usable signal from said input signal and that estimates an interfering signal, representing said interference, from said input signal; a first signal-processing device, supplied only with said usable signal, that processes said usable signal to form a usable output signal therefrom; a second signal-processing device, supplied with said interfering signal, said second signal-processing device simulating a transfer function of an acoustic path of said interference, and applying the simulated transfer function to said interfering signal to form an interfering output signal; a combining device that combines said usable output signal and said interfering output signal; a coupling device coupling said usable signal output to said second signal-processing device, said second signal-processing device varying said simulated transfer function dependent on said usable output signal coupled thereto by said coupling device; and said coupling device has a selectively settable transfer factor that sets a degree of coupling of said usable output signal to said second signal-processing device.