Hearing aid system and hearing aid method

H - Electricity – 04 – R

Patent

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H04R 25/00 (2006.01)

Patent

CA 2469676

A voice inputted in a microphone (11) is converted into an electrical signal and amplified by an amplifier (13). The amplified electrical signal is supplied to a primary coil (15) as an alternating current. Thus, the peripheral magnetic field of the primary coil (15) changes with time, so that an induced electromotive force develops in a secondary coil (17). A vibrating coil (21) is supplied with a current caused by the induced electromotive force, so that an induced magnetic field is produced around the vibrating coil (21). The vibrating coil (21) provided on an eardrum face is excited by the interaction of this induced magnetic field and a static magnetic field generated by a permanent magnet (19).

De la parole prononcée dans un microphone (11) est convertie en un signal électrique et amplifiée par un amplificateur (13). Le signal électrique ainsi amplifié vient alimenter une bobine primaire (15) sous la forme de courant alternatif. Ainsi, le champ magnétique périphérique de la bobine primaire (15) varie avec le temps, de telle sorte qu'une force électromotrice induite se développe dans une bobine secondaire (17). Une bobine vibrante (21) est alimentée par un courant produit par la force électromotrice induite, de telle sorte qu'une champ magnétique induit est généré autour de la bobine vibrante (21). La bobine vibrante (21) placée sur une face d'une membrane du tympan est excitée par l'interaction de ce champ magnétique induit et d'un champ magnétique statique généré par un aimant permanent (19).

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