Feedback Controller Optimization for Active Noise Control Headphones Considering Frequency Response Mismatch between Microphone and Human Ear
Feedback Controller Optimization for Active Noise Control Headphones Considering Frequency Response Mismatch between Microphone and Human Ear
复制标题
考虑麦克风与人耳频率响应不匹配的有源噪声控制耳机的反馈控制器优化
DOI：
10.3390/app12030977
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发表时间：
2022-01
期刊：
影响因子：
--
通讯作者：
Bilong Liu
中科院分区：
文献类型：
--
作者：
Fengyan An;Qianqian Wu;Bilong Liu
本文研究了在反馈传声器对应的主、副通道频率响应与人耳对应的频率响应不匹配的情况下，有源噪声控制耳机的反馈控制器设计问题。首先分析了这种失配对性能的影响，然后提出了一种优化方法，以提高在人耳处的综合性能。在所提出的方法中，反馈回路直接与反馈麦克风和任何额外的虚拟传感技术的滤波器被构造。级联双二阶滤波器被用作控制器，这是根据当前的应用。采用差分进化算法求解该优化问题，得到了最优控制器参数，实验结果表明，在假人头耳位置，即使存在较大的频率响应失配，也能在低频段获得较好的降噪效果，而对高频段的噪声增强有限.
This paper presents an investigation on the feedback controller design for active noise control headphones under the condition that the frequency responses of the primary and secondary paths corresponding to the feedback microphone do not match to the ones corresponding to the human ear. The influence of such mismatches on the performance are analyzed first, and then an optimization method is proposed to enhance the comprehensive performance at the human ear. In the proposed method, the feedback loop is constructed directly with the feedback microphone and any extra filters of the virtual sensing techniques are avoided. Cascade biquad filters are used as the controller, which is in accordance with current applications. A differential evolution algorithm was used to solve the proposed optimization problem, and the optimal parameters of the controller were found. It has been shown by the experimental results that, at the dummy head ear position, good noise reduction performance could be obtained at the low frequency band with limited noise enhancement for high frequencies, even if large frequency response mismatches exist.
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