HANDS FREE NOISE CANCELING HEADSET

摘要

In the area of the active noise cancelation headsets, the noisy environment often encountered in the link with communication systems causes lack of intellig ibility on the outward communications path. Consequently another in-wire cancellation chann el to enhance the intelligibility is required. This additional processing channel adds to the cost of the headset. The invention uses residual microphones to reproduce the sound t hat remains in the ear after cancellation so that the controller can make further ad justments through filter and LMS adapter to the anti-noise signal.