Electrical hearing aid device with high frequency electromagneti

Electrical audio signal processing systems and devices – Hearing aids – electrical

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Details

381321, H04R 2500

Patent

active

061048216

ABSTRACT:
An electrical hearing aid device has a housing in which an integrated amplifier circuit is located. Also contained in the housing is at least one microphone, a switch, a filter, amplifier and a voltage source. The amplifier circuit also has at least one earphone allocated to the amplifier circuit. A protective device provides protection against high frequency electrical waves wherein the integrated amplifier circuit is protected against access of line bound radio frequency currents by filter elements. The filter elements are provided in electrical terminals of the amplifier circuit and directly at the integrated circuit.

REFERENCES:
patent: 4259637 (1981-03-01), Scott
patent: 4918591 (1990-04-01), Link
patent: 4993072 (1991-02-01), Murphy
patent: 5182531 (1993-01-01), Fiedler et al.
patent: 5640457 (1997-06-01), Gnecco et al.
patent: 5708720 (1998-01-01), Meyer
patent: 5796848 (1998-08-01), Martin
patent: 5809151 (1998-09-01), Husung

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