声屏障和有源噪声控制声屏障

Noise barrier and activelly controlled noise barrier

概述了声屏障降低噪声的原理和常用方法，提出了存在的不足；介绍了有源声屏障的降噪性能与发展动态；提出了进一步研究的设想．

This paper outlines the principle and the common methods of analysis of noiseattenuation by sound barrier, points out the disadvantage of the barrier, describes thefunction and the development of the actively controlled noise barrier, and proposes sometentative idea of further study.