Tone generator for use with hearing aids

Communications: electrical – Audible indication – Ultrasonic pest control

Patent

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Details

340384R, 381 682, G08B 300

Patent

active

052669190

ABSTRACT:
A programmable tone generator provides a signal that can be used by a hearing aid wearer to set the gain of the hearing aid such that the hearing threshold is at a prescribed corrected level.

REFERENCES:
patent: 3763488 (1973-10-01), Klasing
patent: 3981007 (1976-09-01), Cieslak et al.
patent: 4054869 (1977-10-01), Smith et al.
patent: 4471171 (1984-09-01), Kopke et al.

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