Feed-Forward and Feedback Active Noise Control System Using FxLMS Algorithm for Narrowband and Broadband Noise

Ease of adaptive filter techniques of its implementation introduce various active noise control (ANC) systems, using different algorithms for efficient and effective acoustic noise control. Filtered-x least mean square (FxLMS) ANC system is used due to secondary path timing delay. In this paper comparison between feed-forward and feedback active noise control system using FxLMS algorithm is done for the two types of noises a) narrowband and b) broadband noise. For this comparison step-size parameter and filter order is assumed to be constant. Mean square error (MSE) for each case is shown to conclude the usefulness of system.