Application of perforated sheets to improve the efficiency of reactive profiled noise barriers

被引：39

作者：

Naderzadeh, Mahdiyeh ^{[1
]}

Monazzam, Mohammad Reza ^{[2
]}

Nassiri, Parvin ^{[2
]}

Fard, Samaneh Momen Bellah ^{[3
]}

机构：

[1] Islamic Azad Univ, Grad Sch Environm & Energy, Sci & Res Branch, Dept Environm Engn, Tehran, Iran

[2] Univ Tehran Med Sci, Sch Publ Hlth, Occupat Hyg Dept, Tehran, Iran

[3] Islamic Azad Univ, Grad Sch Environm & Energy, Sci & Res Branch, Dept Environm Sci, Tehran, Iran

来源：

APPLIED ACOUSTICS | 2011年 / 72卷 / 06期

关键词：

Perforated sheet; Random Sequence Diffuser (RSD); Noise barrier; (BEM) Boundary Element Method; QUADRATIC RESIDUE DIFFUSERS; GENETIC ALGORITHMS; TOP SURFACE; OPTIMIZATION; PERFORMANCE; SHAPE; ABSORBER;

D O I：

10.1016/j.apacoust.2011.01.002

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The scope of this paper is to study the performance of noise barriers treated with different diffusers with/without a perforated sheet. We investigated the barrier insertion loss using a 2D boundary element method (BEM). To obtain a better depth sequence, a Random Sequence Diffuser (RSD) was designed. The results clearly showed that employing a "RSD" instead of the most popular Schroeder diffusers (Quadratic Residue Diffuser and Primitive Root Diffuser) increased the acoustic performance. We also found that the diffuser performance improved by treating the diffuser with perforated sheets either on the top surface or inside the wells. The addition of these perforated sheets inside the "RSD" (barrier model "RP12") improved the performance by 3.59 dB (A). (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：393 / 398

页数：6

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