Patent ID: 9379751
Filing Date: 2016-06-28
CPC Classification: H04B,H04R

Claim Text:
1. A non-closed feed-forward active noise canceling method, comprising: picking up an outside noise signal away from ears; subjecting the picked outside noise signal to feed-forward active noise cancellation to generate an anti-noise signal for balancing out said outside noise signal; mixing the generated anti-noise signal and a voice signal received at the receiving end of the communication equipment; and feeding the mixed signal into the ears to balance out the outside noise signal entering the ears via free space, wherein, when it is detected that there is no voice signal output at the receiving end of said communication equipment, regulating the parameters of the control circuit used in said feed-forward active noise cancellation, wherein, the step of when it is detected there is no voice signal output at a receiving end of a communication equipment, regulating the parameters of the control circuit used in said feed-forward active noise cancellation comprises: wherein the parameters of said control circuit comprise a gain factor and phase adjustment parameters.