Auditory prosthesis equipment

Details Auditory prosthesis equipment Auditory prosthesis equipment

1978-03-13

1980-06-10

Sewell, Paul T.

3 1, H04R 2500

Patent

active

042074410

ABSTRACT:
An equipment is described using n electrode sets implanted in the cochlea at n different locations for allowing the brain to identify n different frequencies. A receiver implant is coupled to the electrode sets through a selector and an external emitter is coupled to a single receiver coil of the implant by means of a single emitter coil. In the emitter the sound information signal is processed for forming n analysis signals of which the frequencies correspond to said n different frequencies and raster signals which are transmitted by modulating a high frequency a.c. signal. Each raster signal comprises at least n pulses of which the durations correspond to the energies to be transmitted to the n electrodes.

REFERENCES:
patent: 3449768 (1969-06-01), Doyle
patent: 3752939 (1973-08-01), Bartz
patent: 4025721 (1977-05-01), Graupe et al.
patent: 4063048 (1977-12-01), Kissiah
IEEE Journal of Solid State Circuits, vol. SC-10, No. 6, Dec., 1975, New York, Gheewala et al., pp. 472-479.

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