An active noise barrier with unidirectional secondary sources

被引：20

作者：

Chen, Weisong ^{[1
,2
]}

Rao, Wei ^{[1
]}

Min, Hequn ^{[1
]}

Qiu, Xiaojun ^{[1
]}

机构：

[1] Nanjing Univ, Inst Acoust, Key Lab Modern Acoust, Nanjing 210093, Peoples R China

[2] Anhui Normal Univ, Wuhu 241000, Peoples R China

来源：

APPLIED ACOUSTICS | 2011年 / 72卷 / 12期

关键词：

Active noise barrier; Unidirectional secondary source; Phase adjustment; CONTROL SYSTEM; OPTIMIZATION; FIELD;

D O I：

10.1016/j.apacoust.2011.06.006

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

An active noise barrier with unidirectional secondary sources is investigated in this paper, where the unidirectional secondary source consists of two closely located loudspeakers with pre-adjusted phase difference. The secondary sound field of the unidirectional sources is adjusted to maximally match the primary sound field in the shadow zone behind the barrier. It is shown both numerically and experimentally that the noise reduction performance of the active noise barrier can be improved remarkably by replacing monopoles with the unidirectional sources. The mechanism for the improvement is also investigated. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：969 / 974

页数：6

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