Thermoviscous effects on sound transmission through a metasurface of hybrid resonances

被引：48

作者：

Jiang, Xue ^{[1
,2
,3
,4
]}

Li, Yong ^{[5
]}

Zhang, Likun ^{[1
,2
]}

机构：

[1] Univ Mississippi, Natl Ctr Phys Acoust, University, MS 38677 USA

[2] Univ Mississippi, Dept Phys & Astron, University, MS 38677 USA

[3] Nanjing Univ, Dept Phys, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[4] Nanjing Univ, Minist Educ, Inst Acoust, Key Lab Modern Acoust, Nanjing 210093, Jiangsu, Peoples R China

[5] Tongji Univ, Sch Phys Sci & Engn, Shanghai Key Lab Special Artificial Microstruct M, Shanghai 200092, Peoples R China

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2017年 / 141卷 / 04期

关键词：

Boundary layers;

D O I：

10.1121/1.4979682

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This letter analytically and numerically examines sound transmission through a metasurface of hybrid resonances in the presence of thermoviscous dissipation. The metasurface unit of a subwavelength thickness consists of a slit and series of sided resonators embedded in air. Both wall friction and thermoviscous diffusivity in the unit are taken into account. The results reveal that the dissipation has a weak influence on phases even when there is a large loss. The dissipation reduces the transmission by 28% when the thermoviscous boundary layer thickness is only around 2.3% of the slit width. Optimal designs for minimal dissipation are addressed. (C) 2017 Acoustical Society of America

引用

页码：EL363 / EL368

页数：6

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