噪声与振动控制Issue(6)：121-125,5.DOI:10.3969/j.issn.1006-1335.2014.06.027
屏体吸声性能布局对声屏障插入损失的影响
Influence of Arrangement of Sound Absorptive Surface on Insertion Loss of Noise Barriers
卢洋1
作者信息
- 1. 上海市环境科学研究院 环评研究中心，上海 200233
- 折叠
摘要
Abstract
BEM is introduced for prediction of insertion loss of hybrid parallel noise barriers with different arrangement of absorptive and reflective façades. In the situation that the area ratio of sound absorptive façade to sound reflective surface of the barrier is 1:1, no distinct difference of the linear sound level insertion losses for different arrangements can be observed as the surface is equally divided into two parts. While the improvement of the insertion loss among the four arrangements can reach 1.5 dB as the surface is equally divided into four parts. The insertion loss of the hybrid noise barrier is mainly affected by the sound absorptive characteristics of the upper and lower parts of the surface. The noise barrier with upper and lower sound absorptive surfaces always has the highest insertion loss. The sound absorptive characteristic of the upper part of the hybrid noise barrier has larger influence than the lower part on the improvement of the insertion loss.关键词
声学/道路噪声控制/插入损失/边界元/声屏障Key words
vibration and wave/traffic noise control/insertion loss/BEM/sound barrier分类
建筑与水利引用本文复制引用
卢洋..屏体吸声性能布局对声屏障插入损失的影响[J].噪声与振动控制,2014,(6):121-125,5.
