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ultirate Audio-Integrated Feedback Active Noise Control Systems Using Decimated-Band Adaptive Filters for Reducing Narrowband Noises
Sensors ( IF 3.9 ) Pub Date : 2020-11-23 , DOI: 10.3390/s20226693
Antonius Siswanto , Cheng-Yuan Chang , Sen M. Kuo

Audio-integrated feedback active noise control (AFANC) systems deliver wideband audio signals and cancel low frequency narrowband noises simultaneously. The conventional AFANC system uses single-rate processing with fullband adaptive active noise control (ANC) filter for generating anti-noise signal and fullband audio cancelation filter for audio-interference cancelation. The conventional system requires a high sampling rate for audio processing. Thus, the fullband adaptive filters require long filter lengths, resulting in high computational complexity and impracticality in real-time system. This paper proposes a multirate AFANC system using decimated-band adaptive filters (DAFs) to decrease the required filter lengths. The decimated-band adaptive ANC filter is updated by the proposed decimated filtered-X least mean square (FXLMS) algorithm, and the decimated-band audio cancelation filter can be obtained by the proposed on-line and off-line decimated secondary-path modeling algorithms. The computational complexity can be decreased significantly in the proposed AFANC system with good enough noise reduction and fast convergence speed, which were verified in the analysis and computer simulations. The proposed AFANC system was implemented for an active headrest system, and the real-time performances were tested in real-time experiments.

中文翻译:

使用抽取频带自适应滤波器的超音频集成反馈有源噪声控制系统,可减少窄带噪声

音频集成反馈有源噪声控制(AFANC)系统可提供宽带音频信号并同时消除低频窄带噪声。常规的AFANC系统使用具有全频带自适应有源噪声控制(ANC)滤波器的单速率处理来生成抗噪声信号,并使用全频带音频消除滤波器来进行音频干扰消除。常规系统需要高采样率来进行音频处理。因此,全频带自适应滤波器需要较长的滤波器长度,从而导致高计算复杂度和实时系统中的不实用性。本文提出了一种使用抽取频带自适应滤波器(DAF)的多速率AFANC系统,以减少所需的滤波器长度。抽取频带自适应ANC滤波器通过提出的抽取滤波X最小均方(FXLMS)算法进行更新,提出的在线和离线抽取二次路径建模算法可以得到抽取频带音频抵消滤波器。在所提出的AFANC系统中,具有足够好的降噪效果和快速的收敛速度,可以显着降低计算复杂度,这已在分析和计算机仿真中得到了验证。提出的AFANC系统用于主动头枕系统,并在实时实验中测试了实时性能。
更新日期:2020-11-23
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