Abstract

Multi-channel Active Noise Control (ANC) system can effectively eliminate low-frequency noise in large scenes, received widespread attention in recent years. First, we derived the multi-channel ANC algorithm, namely the multi-channel Filtered x Least Mean Squared (FxLMS) algorithm. Based on the multi-channel FxLMS algorithm, we analyzed the effect of the step-size parameter on the multi-channel ANC system. The simulation results show that increasing the step-size parameter can effectively improve the low-frequency noise cancellation speed. However, the system stability decreases dramatically when the step-size parameter larger than the threshold. Meanwhile, when the value of step-size is larger than the threshold, the multi-channel ANC system is very sensitive. A small change will have a drastic impact on the multi-channel ANC system.

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