Measurement the Noise Reduction of Doubly Curved Composite Sandwich Structures

被引：0

作者：

Tang, Wing-Cheong ^{[1
]}

机构：

[1] Beijing Jaiotong Univ, Inst Syst Sci, Beijing, Peoples R China

来源：

BUILDING ACOUSTICS | 2008年 / 15卷 / 03期

关键词：

doubly curved; composite sandwich structures;

D O I：

暂无

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Traditional single-layer panels are typically made of a thin metal or plastic and are often unsuitable for an interior finish because thin limp panels do not have enough resistance to combined acoustic-thermal loading. For medium and low frequencies, panels usually require a relatively large absorber thickness and weight. The sound absorber presented is a composite sandwich panel with an air gap between a comparatively stiff thick panel and a flexible thin plate. Under thermal loading, the flexible thin plate is buckled. When suitably adjusted to a particular curvature, an increase in stiffness is obtained which can increase the sound insulation by up to 27 dB between 250 Hz and 500 Hz.

引用

页码：231 / 247

页数：17

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