摘要
本文简要介绍了国内首座在城市汽车道路桥上安装的一定长度的全封闭声屏障的特点，分析了全封闭声屏障特有的隔声效果，论述了全封闭声屏障的结构型式及主要的技术问题。
This article generally introduces the first soundproof insulation like tunnel style surrounding above the metropolitan highway bridge which is to a certainty length. It analyzes the special effect of the soundproof insulation, the structure and the main technical problems.
关键词
全封闭声屏障
直达声
声影区
Soundproof insulation like tunnel style, Direct sound, Sound shadow zone
