ANC System for Noisy Speech

The paper explains the effectiveness of Active Noise Control (ANC) System based on adaptive filter forreducing noise from a noisy speech. ANC generally reduces low frequency noise and creates a quiet zone. In this paper a feedforward ANC is used for reducing low frequency noise from a noisy speech signal for improving speech quality. Secondary path transfer function has been compensated using FXNLMS (Filtered-X NLMS) algorithm. The proposed system is analyzed and simulated on a digital computer. Theperformance of the system is evaluated by measuring noise power reduction in the noisy speech by retaining the intelligibility of the speech signal. Simulation results reveal that the method can reduce noise power to a level of -11.6dB.