A generalized model for space-coiling resonators

被引：20
|
作者：
Wang, Xiaonan [1 ,2 ]
Zhou, Yude [1 ,2 ]
Sang, Jinqiu [3 ]
Zhu, Wenying [1 ,2 ]
机构：
[1] Shanghai Acad Environm Sci, 508 Qinzhou Rd, Shanghai 200233, Peoples R China
[2] Shanghai Engn Res Ctr Urban Environm Noise Contro, 508 Qinzhou Rd, Shanghai 200233, Peoples R China
[3] Chinese Acad Sci, Key Lab Noise & Vibrat Res, Beijing 100190, Peoples R China
来源：
APPLIED ACOUSTICS | 2020年 / 158卷
基金：
美国国家科学基金会;
关键词：
Low-frequency noise control; Coiling partition; Transfer matrix method; HELMHOLTZ RESONATOR; ABSORPTION; DUCT;
D O I：
10.1016/j.apacoust.2019.107045
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
An ultra-thin absorber with a coiling chamber can realize a total sound absorption in an extremely low frequency. This can be regarded as the extreme case of a resonator with an extended partition. A coiled partition extends into a cavity, paving an elongated path and hence tuning the control band into lower frequency. To theoretically investigate the performance evolution during this process, a theoretical model is proposed in this paper, which is then validated by numerical simulations as well as experiments. In fact, this theory links the space-coiling resonator to the conventional Helmholtz resonator and the quarter-wavelength tube, which are two extreme cases representing no partition and full partition, respectively. It turns out that, by extending the partition, the working wavelength can reach approximately 26 times the side length of the original cavity, revealing the effective capability of low frequency control via a small unit. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：6
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