Porous materials for scale model experiments in outdoor sound propagation

被引：11
|
作者：
Horoshenkov, KV [1 ]
Hothersall, DC [1 ]
Attenborough, K [1 ]
机构：
[1] OPEN UNIV, DEPT MECH ENGN, MILTON KEYNES MK7 6AA, BUCKS, ENGLAND
来源：
JOURNAL OF SOUND AND VIBRATION | 1996年 / 194卷 / 05期
关键词：
D O I：
10.1006/jsvi.1996.0389
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
The accuracy of acoustic scale modelling strongly depends on the choice of porous absorbing materials with properties at the scale frequencies which resemble those of full size absorbers. In this paper the Attenborough impedance models are used to identify a combination of microscopic parameters, which ensures that the surface impedance is scaled correctly at the model frequencies. The theory and methodology for the selection are given. Measurements of microscopic and acoustic properties of several uniform common porous materials suggest that the theoretical assumptions are reliable. (C) 1996 Academic Press Limited
引用
收藏
页码：685 / 708
页数：24
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