Realisation of a thermoformed vibro-acoustic metamaterial for increased STL in acoustic resonance driven environments

被引：27

作者：

de Melo Filho, N. G. R. ^{[1
,2
]}

Claeys, C. ^{[1
,2
]}

Deckers, E. ^{[1
,2
]}

Desmet, W. ^{[1
,2
]}

机构：

[1] Katholieke Univ Leuven, Dept Mech Engn, Div PMA, Celestijnenlaan 300 Box 2420, B-3001 Heverlee, Belgium

[2] Flanders Make, DMMS Lab, Lommel, Belgium

来源：

APPLIED ACOUSTICS | 2019年 / 156卷

关键词：

Locally resonant metamaterial; Stop band; Thermoforming; Acoustic mode suppression; SOUND-TRANSMISSION LOSS; STOP BANDS;

D O I：

10.1016/j.apacoust.2019.07.007

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This paper discusses the design and validation of a thermoformed locally resonant metamaterial panel tuned to attenuate the excitation of the first acoustic mode of a cavity. Moreover, it brings resonant meta materials closer to industrial realisations by exploiting a cheap and widely used production process. The concept is explained, and it is shown how the stop band can be tuned to a targeted frequency. Additionally, multiple stop bands are achieved by combining two differently tuned locally resonant parts in the same metamaterial panel. The proposed thermoformed metamaterial panels have similar weight as the original panel and superior experimentally evaluated insertion loss performance in the frequency range of the stop band. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：78 / 82

页数：5

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