| Summary: | 碩士 === 國立交通大學 === 工學院聲音與音樂創意科技碩士學位學程 === 107 === The thesis presents a comparative study of multichannel Filtered x least mean square (MCFXLMS) and Levinson-based lattice algorithm. Two different control modes of the Multichannel feedforward ANC systems are considered in a highly reverberant environment with four noise sources as tested data. Simulations of the study were conducted by using Matlab. The results show that global noise control were achieved with multiple speakers and sensors used. According to the simulation results, MCFXLMS provides the same silent zones as the Levinson-based lattice algorithm, and both algorithms create larger enough silent zones to satisfy the requirements in the frequency below 500Hz. On the other hand, the Levinson-based lattice algorithm achieves higher average noise reduction, especially in broadband noise cases. Further, since the Levinson based lattice algorithm is not an adaptive one, so it is not suitable for complex and non-stationery conditions.
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