Implantable magnetic hearing aid transducer

Details Implantable magnetic hearing aid transducer Implantable magnetic hearing aid transducer

A - Human Necessities

61

F

A61F 11/04 (2006.01) H04R 25/00 (2006.01)

Patent

CA 2165557

A magnetic transducer (100) for improving hearing in a hearing impaired person comprises a magnet assembly (12) and a coil (14) secured inside a housing (10) which is fixed to an ossicle of a middle ear (JJ). The coil (14) is more rigidly secured to the housing (10) than the magnet (12). The magnet assembly (12) and coil (14) are configured such that conducting alternating electrical current through the coil (14) causes magnetic fields of the coil (14) and magnet assembly (12) to cause the magnet assembly (12) and coil (14) to vibrate relative to one another. Because the coil (14) is mole rigidly secured to the housiog (10) than the magnet assembly (12), the vibrations of the coil (14) cause the housing (10) to vibrate. The vibrations are conducted to the oval window of the ear via the ossicles. In alternate embodiments, the transducer (100) is secured to ossicular protheses that are secured within the middle ear (JJ).

Un transducer magnétique (100) conçu pour améliorer l'audition chez une personne à l'audition affaiblie comprend un ensemble aimant (12) et une bobine (14) fixés dans un boîtier (10) placé sur un osselet de l'oreille moyenne (JJ). La bobine (14) est fixée au boîtier (10) plus rigidement que l'aimant (12). L'ensemble aimant (12) et la bobine (14) sont configurés de sorte que le courant électrique alternatif conducteur passant à travers la bobine (14) induit des champs magnétiques dans la bobine (14) et l'ensemble aimant (12) qui provoquent la vibration de l'ensemble aimant (12) et de la bobine (14) l'un par rapport à l'autre. Comme la bobine (14) est fixée plus rigidement au boîtier (10) que l'ensemble-aimant (12), les vibrations de la bobine (14) provoquent la vibration du boîtier (10). Les vibrations sont transmises à la fenêtre ovale de l'oreille par les osselets. Dans d'autres modes de réalisation, le transducteur (100) est fixé à des prothèses ossiculaires qui sont fixées dans l'oreille moyenne (JJ).

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