Resonant modal group theory of membrane-type acoustical metamaterials for low-frequency sound attenuation
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Resonant modal group theory of membrane-type acoustical metamaterials for low-frequency sound attenuation
- 发表刊物：
- The European Physical Journal Applied Physics
- 摘要：
- In order to overcome the influence of the structural resonance on the continuous structures and obtain a lightweight thin-layer structure which can effectively isolate the low-frequency noises, an elastic membrane structure was proposed. In the low-frequency range below 500 Hz, the sound transmission loss (STL) of this membrane type structure is greatly higher than that of the current sound insulation material EVA (ethylene-vinyl acetate copo) of vehicle, so it is possible to replace the EVA by the membranetype metamaterial structure in practice engineering. Based on the band structure, modal shapes, as well as the sound transmission simulation, the sound insulation mechanism of the designed membrane-type acoustic metamaterials was analyzed from a new perspective, which had been validated experimentally. It is suggested that in the frequency range above 200 Hz for this membrane-mass type structure, the sound insulation effect was principally not due to the low-level locally resonant mode of the mass block, but the continuous vertical resonant modes of the localized membrane. So based on such a physical property, a resonant modal group theory is initially proposed in this paper. In addition, the sound insulation mechanism of the membrane-type structure and thin plate structure were combined by the membrane/plate resonant theory.
- 合写作者：
- Fuyin Ma, Jiu Hui Wu, and Meng Huang
- 卷号：
- 71(3)
- 页面范围：
- 30504
- 是否译文：
- 否
- 发表时间：
- 2015-08-27