Hearing aid having externally controlled amplifier gain and meth

Details Hearing aid having externally controlled amplifier gain and meth Hearing aid having externally controlled amplifier gain and meth

1995-03-20

1997-12-09

Kuntz, Curtis

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Testing of hearing aids

381 58, 381 684, 330138, H04R 2900

Patent

active

056968337

ABSTRACT:
An electronic device is set forth that allows external control of a controllable electronic function of the device. The device includes a function circuit for implementing an electronic function in response to a signal at a function control signal input. The function circuit receives DC power from a power supply that is connected between two battery terminals. The DC power from the power supply circuit is supplied at a predetermined DC voltage level. A control circuit is included in the device and is responsive to a signal superimposed on the predetermined DC voltage level of the power supply at the two battery terminals for generating a function control signal to the function control signal input of the function circuit. In accordance with one embodiment of the present invention, the invention is implemented in the context of a hearing aid.

REFERENCES:
patent: 4061041 (1977-12-01), Fletcher et al.
patent: 4170720 (1979-10-01), Killion
patent: 4821329 (1989-04-01), Straub

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