Round window electromagnetic implantable hearing aid

Details Round window electromagnetic implantable hearing aid Round window electromagnetic implantable hearing aid

1992-10-09

1994-11-01

Kamm, William E.

Surgery

Surgically implanted vibratory hearing aid

607 55, A61N 100

Patent

active

053603885

ABSTRACT:
An implantable hearing aid device including a vibrational element which is mounted to the round window of the cochlea and a transmitter which can be mounted externally of the ear or within the mastoid bone of the skull. The transmitter includes a microphone for picking up sound waves and converting the sound waves into electromagnetic signals which are imparted to the vibrational element fixed to the round window of the cochlea. The placement of the vibrational element on the round window provides significant advantages over conventional implantable hearing aids which transmit vibrational impulses to the oval window of the cochlea through a pathway which interferes with normal hearing. With the implantable hearing device of the present invention, the normal pathway used for receiving acoustically input sound waves is left unobstructed. With such an arrangement, two separate pathways are available for inputting vibrations to the cochlea, which allows constructive and destructive interference patterns to be set up between the acoustic wave vibrations and the magnetically induced vibrations. This allows the amplification of the signal components and canceling of the noise components.

REFERENCES:
patent: 3594514 (1971-07-01), Wingrove
patent: 3764748 (1973-10-01), Branch et al.
patent: 4606329 (1986-08-01), Hough
patent: 4612915 (1986-09-01), Hough et al.
patent: 4817607 (1989-04-01), Tatge
patent: 4936305 (1990-06-01), Ashtiani et al.
patent: 4957478 (1990-09-01), Maniglia

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