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摘要


本篇論文使用主動式噪音控制(active noise control, ANC)系統應用於挖土機駕駛艙,進行消除噪音以達到保護駕駛人聽力之目的。使用數位訊號處理器(digital signal processor, DSP)、參考麥克風(reference microphone)、誤差麥克風(error microphone),以及播放反噪音的次級喇叭(secondary loudspeaker),並搭配基於filtered-x least-mean-square(FXLMS)演算法的多通道前饋型(multiple channel feedforward)主動式噪音控制系統,對於挖土機引擎的噪音,可在駕駛艙內頭部可移動範圍達到15 dBC以上的消噪效果。

並列摘要


This paper use active noise control (ANC) on the cabin of earthmoving machine and cancel the noise to protect the driver to avoid the hearing impairment. The ANC system build up by digital signal processor (DSP), reference microphone, error microphone, and secondary loudspeaker. With the multiple channel feedforward ANC system based on the filtered-x least-mean-square (FXLMS) algorithm. The noise canceling performance can achieve more than 15 dBC around the drive's head in the cabin.

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