Low-frequency sound absorbing metasurface using multilayer split resonators

被引：7

作者：

Takasugi, Shota ^{[1
]}

Watanabe, Keita ^{[1
]}

Misawa, Masaaki ^{[1
]}

Tsuruta, Kenji ^{[1
]}

机构：

[1] Okayama Univ, Dept Elect & Elect Engn, Kita Ku, 3-1-1 Tsushima Naka, Okayama 7008530, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2021年 / 60卷 / SD期

关键词：

sound absorber; metasurface; finite-element simulation; split tube resonator;

D O I：

10.35848/1347-4065/abe2e5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Among the acoustic metasurfaces that can control the propagation of sound waves with the structure far thinner than the wavelength at the operating frequency, the split tube structure has shown its effectiveness in the lower frequency band. Here we focus on multiply layered split tubes to broaden the absorption spectrum. By numerical analysis, we show up-to six-layer structure possessing wideband (1-1000 Hz) sound absorption. The absorbing peaks in the frequency band below 1000 Hz are shown to be multiplexed not only by simple superposition of vibrational modes of each layer, but also by hybridization of the modes indicating collective motion of tubes.

引用

页数：7

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