Hearing aid having a liquid transmission means communicative wit

Details Hearing aid having a liquid transmission means communicative wit Hearing aid having a liquid transmission means communicative wit

1990-10-17

1993-01-05

Kamm, William E.

Surgery

Surgically implanted vibratory hearing aid

128420006, H04R 2500

Patent

active

051766205

ABSTRACT:
A hearing aid (100) is provided for surgically implanting in the ear of a subject. A liquid filled tube (142) is positioned between an orifice of the cochlea and a subcutaneous amplifier (200). A microphone (122) converts sound waves outside the subject into electrical signals which are amplified by the amplifier and are converted back into amplified mechanical motion by a transducer means (124). The amplified mechanical motion is transmitted through the tube by the liquid to the cochlea bypassing the outer and middle ears. The liquid and dimensions of the tube are selected to substantially match the acoustic impedance of the cochlea at the distal end of the tube.

REFERENCES:
patent: 4357497 (1982-11-01), Hochmair et al.
patent: 4606329 (1986-08-01), Hough
patent: 4988333 (1991-01-01), Engebretson et al.
patent: 5085628 (1992-02-01), Engebretson et al.

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