Hearing aid adaptable for telephone listening

Details Hearing aid adaptable for telephone listening Hearing aid adaptable for telephone listening

1988-10-11

1991-02-19

Ng, Jin F.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 68, H04R 2500

Patent

active

049950851

ABSTRACT:
A hearing aid has a microphone, an amplifier and a receiver and at least one frequency-defining element in series with a switch connected to the amplifier. For telephone listening, the switch is closed and the frequency-defining element lowers the high frequencies in the incoming signal from the telephone receiver so that a comfortable tone results for the hearing-impaired person using the telephone. The frequency-defining element may be a part of a frequency-dependent voltage divider, a part of a frequency-dependent negative feedback circuit, or a component in a resonant circuit.

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"Telephone Coupler", Hearing Instruments, Jun. 1986, p. 37.

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