Method and apparatus for reducing audio interference from cellul

Details Method and apparatus for reducing audio interference from cellul Method and apparatus for reducing audio interference from cellul

1996-02-21

1999-12-28

Le, Vu

Telecommunications

Transmitter and receiver at separate stations

Distortion, noise, or other interference prevention,...

455106, 455300, 379 52, 381 231, H04B 110

Patent

active

060093110

ABSTRACT:
Apparatus and method for reducing the interference of digital cellular telephones with hearing aids. A digital cellular phone is provided with a second antenna that transmits a local, low-power signal which fills in the gaps in the transmitted switched information carrier. This prevents the hearing aid from demodulating the low frequency switched carrier components of the digital cellular phone. Alternatively, the main antenna can transmit on a garbage frequency between time slots, or the hearing aid can detect and cancel the interfering signal.

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