Patent ID: 8265313

Claim:
A method for cancelling or preventing feedback in a hearing device comprising a microphone ( 1 ), a transfer function ( 2 ) and a receiver ( 3 ), wherein the transfer function ( 2 ) defines relation between an input signal ( 12 ) of the hearing device and an output signal ( 13 , 13 ′) of the hearing device, the method comprising the steps of: estimating an external transfer function ( 21 ) of an external feedback path ( 11 ) defined by sound traveling from the receiver ( 3 ) to the microphone ( 1 ), characterized by comprising the steps of estimating the input signal ( 12 ′) having no feedback components of the external feedback path ( 11 ) using an auxiliary signal ( 15 ) comprising no feedback components of the external feedback path ( 11 ), and using the estimated input signal ( 14 ) for estimating the external transfer function ( 21 ) of the external feedback path ( 11 ).