Abstract
Active noise control headphones have become one of the most popular wearable personal devices currently. In this paper, the feedforward controller design problem using cascade biquad filters is addressed with respect to multiple incident directions of the primary noise. Criterion functions evaluating the comprehensive noise reduction performance are given, and the optimization methods for both single-channel and multi-channel controllers are proposed where Differential Evolution algorithm is used to find the global minimum. Experiments based on a commercial headphone are carried out and the results have validated the proposed methods. It has been shown that the comprehensive performance under multiple directions would be significantly improved when multiple reference microphones are used along with a multi-channel control strategy.
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