Fitting method and a hearing aid for suppression of...

H - Electricity – 04 – R

Patent

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H04R 25/00 (2006.01)

Patent

CA 2442538

A fitting method is provided for a multichannel hearing aid (20) with at least one low frequency channel (361) having an individually adjustable compressor (381). The method comprises the steps of first adjusting the characteristic of the compressor according to the hearing loss to be compensated by the hearing aid, followed by the step of increasing the compression ratio of the characteristic of the compressor in the at least one low frequency band. The at least one low frequency channel may further comprise an offset amplifier adding an offset gain to the compressor characteristic, and the method may further comprise the step of adjusting the offset gain in the range from -20 dB to 20 dB. After adjustment according to the method, compressors operating at low frequencies enhance low level signals and attenuate high level signals whereby perception of occlusion is suppressed. The invention provides a fitting method and a hearing aid for suppression of perceived occlusion.

La présente invention concerne un procédé d'adaptation pour un appareil de correction auditive multicanaux (20) présentant au moins un canal basse fréquence (36¿1?) qui comprend un compresseur à réglage individuel (38¿1?). Ce procédé consiste d'abord à régler la caractéristique du compresseur, en fonction de la perte auditive qui doit être compensée, à l'aide de cet appareil de correction auditive, puis à augmenter le taux de compression de la caractéristique du compresseur dans ladite bande basse fréquence, ledit canal basse fréquence pouvant également comprendre un amplificateur de décalage qui ajoute un gain de décalage à la caractéristique du compresseur. Ledit procédé consiste également à régler le gain de décalage dans le domaine allant de -20 dB à 20 dB. Après réglage selon le procédé, des compresseurs fonctionnant à basses fréquences améliorent des signaux de bas niveau et atténuent des signaux de haut niveau, ce qui permet de supprimer la perception d'une occlusion. La présente invention concerne un procédé d'adaptation et un appareil de correction auditive permettant de supprimer une occlusion perçue.

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