Hearing aid and system for use with cellular telephones
First Claim
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1. A hearing aid for use with a light-emitting diode (LED)-equipped cellular telephone, comprising:
- a microphone;
a receiver;
a hearing aid circuit operatively connected to the microphone and receiver;
a photodiode;
an audio-frequency demodulator;
a bandpass filter connected in series between the photodiode and the demodulator; and
switch means having a first state and a second state, the switch means causing the receiver to be operatively responsive to signals from the demodulator when in the first state and causing the receiver to be operatively responsive to signals from the microphone when in the second states.
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Abstract
The light output of an IR LED mounted on a cellular telephone is modulated by the audio output of the telephone and made incident upon a photodiode mounted to an ITE-type or canal-type hearing aid. The electrical signal output from the photodiode is routed through a bandpass filter, demodulated in a demodulator and amplified and/or processed in the hearing aid circuit.
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Citations
7 Claims
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1. A hearing aid for use with a light-emitting diode (LED)-equipped cellular telephone, comprising:
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a microphone; a receiver; a hearing aid circuit operatively connected to the microphone and receiver; a photodiode; an audio-frequency demodulator; a bandpass filter connected in series between the photodiode and the demodulator; and switch means having a first state and a second state, the switch means causing the receiver to be operatively responsive to signals from the demodulator when in the first state and causing the receiver to be operatively responsive to signals from the microphone when in the second states. - View Dependent Claims (2, 3, 4, 5)
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6. A hearing aid system for use with a cellular telephone, comprising:
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a light-emitting diode (LED) operatively connected to the cellular telephone in such as manner as to produce a light output that is modulated by audio-frequency electrical signals output by the telephone; and a hearing aid, the hearing aid comprising a microphone, a receiver, a hearing aid circuit operatively connected to the microphone and receiver, a photodiode, an audio-frequency demodulator, a bandpass filter connected in series between the photodiode and the demodulator, and a switch electrically located between the demodulator and the hearing aid circuit, the switch selectively connecting the demodulator to the hearing aid circuit. - View Dependent Claims (7)
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Specification