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  • 學位論文

主動噪音控制應用於管路型噪音消除

Active Noise Control for Duct Noise Cancellation

指導教授 : 張政元 郭森楙

摘要


此篇論文應用主動噪音控制(Active Noise Control, ANC)技術來消除管路內的大型風扇噪音。錄製風扇噪音前使用了取樣管來包覆麥克風,進而避免讓麥克風收到風切以及湍流聲,在演算法部分上,我們使用了前饋式、回饋式、混合式、有限脈衝響應的回饋中和演算法,以及無限脈衝響應的回饋中和演算法來消除管路內的風扇噪音。此篇論文有使用白噪音以及風扇噪音在管路內播放,實驗結果可以讓白噪音消除18 dBA左右,在實際錄製的風扇噪音聲可以消除15dBA,進而實現管路消除噪音的研究。

並列摘要


This thesis applies active noise control techniques to cancel large fan noise and white noise in a duct. A probe-tube microphone is designed for measuring noise in windy environment to avoid wind interference. We apply feedforward, feedback, hybrid and using FIR filters with feedback neutralization, and IIR filters with feedback neutralization algorithms for the experiments. Really time experimental results show the performance of the white noise cancelation in the duct is 18 dB(A), and 15dB(A) for the fan noise.

參考文獻


[16]邱逸翔,“窄頻主動噪音控制系統之性能改良研究”,中原大學電機工程學系碩士學位論文,2013。
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[2]B. Widrow and S. D. Stearns, Adaptive signal processing, Englewood Cliffs, NJ : Prentice-Hall, 1985
[3]J. C. Burgess, “Active Adaptive Sound Control in a Duct: A Computer Simulation,” Journal of Acoustical Society of America, vol. 70, no. 3, pp. 715-726, 1981.
[4]L. Eriksson, M. Allie and R. Greiner, “The Selection and Application of an IIR Adaptive Filter for Use in Active Sound Attenuation,” IEEE Transaction on Acoustics, Speech, Signal Processing, vol. 35, no. 4, pp. 433-437, 1987.

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