DESIGN OF THE SOUND ABSORPTION COEFFICIENT OF THE NOISE BARRIER SURFACE

被引：0
|
作者：
Slechta, Jan [1 ]
机构：
[1] Czech Tech Univ, Fac Civil Engn, Thakurova 7, Prague 16629 6, Czech Republic
来源：
AD ALTA-JOURNAL OF INTERDISCIPLINARY RESEARCH | 2013年 / 3卷 / 02期
关键词：
image sources; boundary element method; insertion loss; noise barrier; absorption coefficient; sound wave reflection;
D O I：
暂无
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The purpose of this paper is to verify whether the image sources method used for the calculation of the sound wave reflected from a vertical obstacle is precise enough to be used in noise mapping. Numerical modelling with the boundary element method was used as a tool for the verification of the method precision. The insertion loss of the obstacle was calculated with the BEM in many receivers. Two variants of sound absorption coefficient of the noise barrier surface were included in the calculation. Results obtained by the BEM calculations were fitted with the quadratic curve and compared with the values obtained by the image sources method. It was concluded that the image sources method is on the safe side. Nevertheless, the deviation on the safe side was acceptable.
引用
收藏
页码：114 / 117
页数：4
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