An active noise control algorithm for controlling multiple sinusoids
作者:
Seung Man Lee,
Hyuck Jae Lee,
Cha Hee Yoo,
Dae Hee Youn,
Il Whan Cha,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1998)
卷期:
Volume 104,
issue 1
页码: 248-254
ISSN:0001-4966
年代: 1998
DOI:10.1121/1.423276
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The filtered-xLMS algorithm and its modified versions have been successfully applied in suppressing acoustic noise such as single and multiple tones and broadband random noise. This paper presents an adaptive algorithm based on the filtered-xLMS algorithm which may be applied in attenuating tonal acoustic noise. In the proposed method, the weights of the adaptive filter and estimation of the phase shift due to the acoustic path from a loudspeaker to a microphone are computed simultaneously for optimal control. The algorithm possesses advantages over other filtered-xLMS approaches in three aspects: (1) each frequency component is processed separately using an adaptive filter with two coefficients, (2) the convergence parameter for each sinusoid can be selected independently, and (3) the computational load can be reduced by eliminating the convolution process required to obtain the filtered reference signal. Simulation results for a single-input/single-output (SISO) environment demonstrate that the proposed method is robust to the changes of the acoustic path between the actuator and the microphone and outperforms the filtered-xLMS algorithm in simplicity and convergence speed.
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