Wide-band sound-absorbing structures for aircraft engine ducts

被引：6
|
作者：
Sobolev, AF [1 ]
机构：
[1] Zhukovskii Cent Aerohydrodynam Inst, Moscow 107005, Russia
来源：
ACOUSTICAL PHYSICS | 2000年 / 46卷 / 04期
关键词：
Perforation; Acoustics; Impedance Characteristic; Wide Frequency Range; Sound Absorption;
D O I：
10.1134/1.29911
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
With a view to providing sound absorption in a wide frequency range, one- and two-layer sound-absorbing structures, in which nets are used as absorbing layers, are investigated. A semiempirical theory of calculating the impedance characteristics of these structures is proposed. The theory takes into account the interaction between the net layers for a wide range of their perforation factors. A good agreement between theory and experiment is observed. It is shown that two-layer net structures are vastly superior to two-layer structures with perforated panels from the viewpoint of the sound absorbtion bandwidth. (C) 2000 MAIK "Nauka/Interperiodica".
引用
收藏
页码：466 / 473
页数：8
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