能動的音響制御のための周波数領域適応アルゴリズム : 第2報, ダクトモデルによる実験的検討

概要

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A new adaptive control algorithm in the frequency domain was proposed. This frequency domain approach is an alternative to the ordinary filtered-x least mean squares (LMS) algorithm in the time domain. A transfer characteristic of an acoustic path is identified adaptively in the frequency domain using the fast Fourier transform (FFT). The real-time control of the noise reduction in an L-formed duct model was carried out. A digital signal processor and a personal computer were used for the active noise control. The maximum noise reduction level of about 30 dB and the average reduction level of about 7 dB were obtained through the experiment. As a result, it was shown that this frequency domain adaptive algorithm has faster convergence compared to the ordinary filtered-x LMS algorithm.
一般社団法人日本機械学会の論文
1996-04-25