Sound absorption performance of various nickel foam-base multi-layer structures in range of low frequency

被引：22

作者：

Cheng, Wei ^{[1
]}

Duan, Cui-yun ^{[1
]}

Liu, Pei-sheng ^{[1
]}

Lu, Miao ^{[1
]}

机构：

[1] Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2017年 / 27卷 / 09期

关键词：

reticular metal foam; reticular nickel foam; composite structure for sound absorption; low frequency sound absorption; POROUS METAL FOAMS; CELL ALUMINUM FOAM; INSULATION PROPERTY; TYPICAL LOADS; MODEL; POROSITY;

D O I：

10.1016/S1003-6326(17)60223-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Commercial 3D reticular nickel foam and its composite structure were investigated on the sound absorption at 200-2000 Hz. The absorption performance of foam plates 1-5 layers (1-layer thickness: 2.3 mm; porosity: 89%; average pore-diameter: 0.57 mm) was found to be poor, and could be improved by adding backed cavum or front perforated thin sheet. The absorption coefficient could reach about 0.4 at 1000-1600 Hz for the composite structure of 5-layer foam with a backed 5 mm-thick cavum, and even 0.68 at about 1000 Hz for that of 2-layer foam with the same cavum and a perforated plate closely in front of the foam.

引用

页码：1989 / 1995

页数：7

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