A lightweight low-frequency sound insulation membrane-type acoustic metamaterial
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- A lightweight low-frequency sound insulation membrane-type acoustic metamaterial
- 发表刊物：
- AIP Advances
- 摘要：
- A novel membrane-type acoustic metamaterial with a high sound transmission loss (STL) at low frequencies (<=500Hz) was designed and the mechanisms were investigated by using negative mass density theory. This metamaterial’s structure is like a
sandwich with a thin (thickness=0.25mm) lightweight flexible rubber material within
two layers of honeycomb cell plates. Negative mass density was demonstrated at
frequencies below the first natural frequency, which results in the excellent lowfrequency
sound insulation. The effects of different structural parameters of the membrane
on the sound-proofed performance at low frequencies were investigated by
using finite element method (FEM). The numerical results show that, the STL can be
modulated to higher value by changing the structural parameters, such as the membrane surface density, the unite cell film shape, and the membrane tension. The acoustic metamaterial proposed in this study could provide a potential application in the
low-frequency noise insulation.
- 合写作者：
- Kuan Lu, Jiu Hui Wu, Dong Guan, Nansha Gao, and Li Jing
- 卷号：
- Vol. 6
- 页面范围：
- 025116
- 是否译文：
- 否
- 发表时间：
- 2016-02-18