Hearing aid and method of estimating dynamic gain limitation...

H - Electricity – 04 – R

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H04R 25/00 (2006.01)

Patent

CA 2647479

There is presented a hearing aid that comprises an input transducer for transforming an acoustic input signal into an electrical input signal, a compressor for generating an electrical output signal from the electrical input signal, an output transducer for transforming the electrical output signal into an acoustic output signal, an autocorrelation estimator for calculating an autocorrelation estimate of the electrical input signal, and an acoustic loop gain estimator for determining a dynamic gain limit from the autocorrelation estimate and an instantaneous gain level of the signal processor. The invention further provides a method of adjusting signal path gain in a hearing aid, and a system for providing increased stability in a hearing aid.

Cette invention concerne un appareil auditif comprenant un transducteur d'entrée conçu pour transformer un signal d'entrée acoustique en un signal d'entrée électrique, un compresseur conçu pour générer un signal de sortie électrique à partir du signal d'entrée électrique, un transducteur de sortie conçu pour transformer le signal de sortie électrique en un signal de sortie acoustique, un estimateur d'autocorrélation conçu pour calculer une estimation de l'autocorrélation du signal d'entrée électrique, et un estimateur de gain de boucle acoustique pour déterminer un gain maximum dynamique à partir de l'estimation de l'autocorrélation et un niveau de gain instantané du processeur de signaux.

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