Journal
APPLIED ACOUSTICS
Volume 116, Issue -, Pages 271-282Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apacoust.2016.09.031
Keywords
Active noise control (ANC); Fixed-point DSP; Filtered-x LMS (FxLMS); Quantization and round-off error; Active noise reduction
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In this paper, we have proposed a new algorithm considering commutation error and feedback effect to enhance the convergence rate and noise reduction efficiency of ANC controller. In order to improve noise reduction performance of the ANC headset with fixed-point DSP, we'have proposed a new FxLMS algorithm, FxLMS CF, which considers the commutation error and feedback. Also, using a non-real-time simulation, we have decided the phase and amplitude compensation factors of anti-noise signal considering round-off and quantization error, nonlinear distortion and delay of analog device. We estimated the phase and amplitude compensation factors by simulation without using any special measuring devices or analysis devices, and reduced the broadband noise by 24 dB. (C) 2016 Elsevier Ltd. All rights reserved.
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