Double-negative acoustic metamaterial based on hollow steel tube meta-atom

Huaijun Chen, Hongcheng Zeng, Changlin Ding, Chunrong Luo, Xiaopeng Zhao

科研成果: 期刊稿件文章同行评审

57 引用 (Scopus)

摘要

We presented an acoustic meta-atom model of hollow steel tube (HST). The simulated and experimental results demonstrated that the resonant frequency is closely related to the length of the HST. Based on the HST model, we fabricated a two-dimensional (2D) acoustic metamaterial (AM) with negative effective mass density, which put up the transmission dip and accompanied inverse phase in experiment. By coupling the HST with split hollow sphere (SHS), another kind of meta-atom with negative effective modulus in the layered sponge matrix, a three-dimensional (3D) AM was fabricated with simultaneously negative modulus and negative mass density. From the experiment, it is shown that the transmission peak similar to the electromagnetic metamaterials exhibited in the double-negative region of the AM. We also demonstrated that this kind of double-negative AM can faithfully distinguish the acoustic sub-wavelength details (λ / 7) at the resonance frequency of 1630 Hz.

源语言英语
文章编号104902
期刊Journal of Applied Physics
113
10
DOI
出版状态已出版 - 14 3月 2013

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