A hearing aid and a method of processing input signals in a...

H - Electricity – 04 – R

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H04R 25/00 (2006.01)

Patent

CA 2624373

A hearing aid comprises two microphones, directional processing means (Dir1, Dir2) for combining the respective audio signals to form a spatial signal, a beamformer (35) for controlling the directional processing means to provide adaptation of the spatial signal, and means (LFB1, LFB2) for boosting low frequencies of the spatial signal. A feedback estimator generates a feedback compensation signal (7a, 7b), which is combined with the boosted spatial signal. By applying feedback compensation only after directional processing and low frequency boosting, the device avoids interference by the feedback estimator with the function of the beamformer. The invention also provides a method of processing signals in a hearing aid.

L'invention concerne une prothèse auditive qui comprend deux microphones, des moyens de traitement directionnels (Dir1, Dir2) permettant de combiner les signaux audio respectifs afin de former un signal dans l'espace, un dispositif de formation de faisceau (35) permettant de commander les moyens de traitement directionnels afin de fournir une adaptation du signal dans l'espace, ainsi que des moyens (LFB1, LFB2) permettant d'amplifier des basses fréquences du signal dans l'espace. Un estimateur par rétroaction génère un signal de compensation par rétroaction (7a, 7b) qui est combiné avec le signal amplifié dans l'espace. En appliquant une compensation par rétroaction uniquement après le traitement directionnel et une amplification de basses fréquences, le dispositif évite, grâce à l'estimateur par rétroaction, une interférence avec la fonction du dispositif de formation de faisceau. L'invention concerne également un procédé de traitement de signaux dans une prothèse auditive.

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