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Locally Resonant Sonic Materials

Authors Liu, Zhengyou
Zhang, Xixiang
Mao, Yiwei
Zhu, Yongyuan
Yang, Zhi Yu
Chan, Che Ting
Sheng, Ping
Issue Date 2000
Source Science , v. 289, (5485), September 2000, p. 1734-1736
Summary We have fabricated sonic crystals, based on the idea of Localized resonant structures, that exhibit spectral gaps with a Lattice constant two orders of magnitude smaller than the relevant wavelength. Disordered composites made from such localized resonant structures behave as a material with effective negative elastic constants and a total wave reflector within certain tunable sonic frequency ranges. A 2-centimeter slab of this composite material is shown to break the conventional mass-density Law of sound transmission by one or more orders of magnitude at 400 hertz.
ISSN 0036-8075
Language English
Format Article
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