Electrical audio signal processing systems and devices – Hearing aids – electrical
Patent
1997-08-28
2000-08-15
Kuntz, Curtis A.
Electrical audio signal processing systems and devices
Hearing aids, electrical
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.
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patent: 5708720 (1998-01-01), Meyer
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patent: 5809151 (1998-09-01), Husung
Dabney P.
Kuntz Curtis A.
Siemens Audiologische Technik GmbH
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