Circuit arrangement for preventing feedback

Details Circuit arrangement for preventing feedback Circuit arrangement for preventing feedback

H - Electricity

04

M

379/81

H04M 1/20 (2006.01) H04R 3/02 (2006.01)

Patent

CA 1096523

ABSTRACT OF THE DISCLOSURE This hands-free telephone prevents acoustic feedback between its speaker and microphone by attenuating either the transmission or receive path under the control of a corresponding pair of counters (computers), each counter sensing the signal divided and digitized from its corresponding path. An increase in counted pulses indicates feedback and causes a counter to more quickly reach a predetermined counter state (count), to trigger attenuation (damping) before it can be reset (restored) to zero by the other counter.

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