A space-coiled acoustic metamaterial with tunable low-frequency sound absorption

被引：64
|
作者：
Wang, Yang [1 ]
Zhao, Honggang [1 ]
Yang, Haibin [1 ]
Zhong, Jie [1 ]
Wen, Jihong [1 ]
机构：
[1] Natl Univ Def Technol, Lab Sci & Technol Integrated Logist Support, Changsha 410073, Hunan, Peoples R China
来源：
EPL | 2017年 / 120卷 / 05期
基金：
中国国家自然科学基金;
关键词：
PERFORATED PANEL ABSORBERS; RESONATORS; PERFECT;
D O I：
10.1209/0295-5075/120/54001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A novel low-frequency absorber composed a perforated panel and a cavity with a coiled-up channel is presented and demonstrated. Both theoretical analysis and finite element method are utilized to reveal that the absorber possesses a low-frequency absorption with deepsubwavelength thickness. The effect of the folding number of a space-coiled channel on the absorption peak position is discussed and the result shows that a greater folding number can reduce the absorption peak frequency dramatically without sacrificing the total thickness of the absorber. In order to broaden the absorption bandwidth, an absorber combining two units with different folding number is constructed to further enhance the low-frequency absorption performance. Copyright (C) EPLA, 2018.
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页数：5
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