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US 4,790,019 AGranted
Remote hearing aid volume control
AssigneeViennatone Gesellschaft m.b.H.
InventorFritz Hueber
Life of this patent
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Abstract
A hearing aid comprises a microphone, a battery-operated earphone, and amplifying circuit connected to the microphone output, the amplifying circuit including a frequency-selective circuit component and a sound level adjustment circuit component connected to the frequency-selective circuit component, and a remote sound wave control signal emitter circuit separate from the microphone, earphone and amplifying circuit and emitting sound wave control signals within the range of the microphone input.
Claims17
In combination:
- (a) a hearing aid to be worn on the head of a hard-of-hearing person comprising
- (1) a microphone in the hearing aid having an input and an output for respectively receiving and transmitting a range of sound wave signals comprising speech signals and control signals,
- (2) a battery-operated earphone in the hearing aid having an input for receiving the range of sound wave signals transmitted by the microphone, and
- (3) an amplifying circuit in the hearing aid connecting the microphone output to the earphone input, the amplifying circuit including a frequency-selective circuit component comprising a high-pass filter and a low-pass filter to divide the speech signals from the control signals and a sound level adjustment circuit component for the speech signal connected to the frequency-selective circuit component;
- (b) a memory for the adjusted sound level connected to the sound level adjustment circuit component for controlling the sound level to store the adjusted sound level;
- and
- (c) a remote sound wave control signal emitter circuit separate from the hearing aid and emitting sound wave control signals within the frequency range of the microphone input.
4 more elements
Dependencies are inferred from the claim text.