A HEARING AID COMPRISING A FEEDBACK CONTROL SYSTEM

A hearing aid comprises a forward path comprising a) at least one input transducer proving at least one electric input signal, b) a hearing aid processor, and c) an output transducer. The hearing aid further comprises d) a feedback control system comprising d1) a feedback path estimator comprising a...

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Bibliographische Detailangaben
Hauptverfasser:	GUO, Meng, KUENZLE, Bernhard, MENG, Anders
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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Beschreibung
Zusammenfassung:	A hearing aid comprises a forward path comprising a) at least one input transducer proving at least one electric input signal, b) a hearing aid processor, and c) an output transducer. The hearing aid further comprises d) a feedback control system comprising d1) a feedback path estimator comprising an adaptive filter configured to provide an estimate of a current feedback path from said output transducer to said at least one input transducer, the feedback path estimator being controllable via a feedback estimation control input, and d2) a combination unit in the forward path configured to subtract said estimate (v') of the current feedback path signal (v) from a signal of the forward path (y) to provide a feedback corrected signal (e), and e) a detector for providing the feedback estimation control input in dependence of an offset control signal indicative of an offset in the at least one electric input signal or a signal originating therefrom. A method of operating a hearing aid is further disclosed.