Ultra-broadband sound absorption of a hierarchical acoustic metamaterial at high temperatures
APPLIED PHYSICS LETTERS(2021)
摘要
We develop a hierarchical acoustic metamaterial with ultra-broadband sound absorption and promising applications at high temperatures as a super sound absorber. The proposed metamaterial is constructed through tailoring structural configurations by vertex-based hierarchy. The hierarchical design enables the acoustic metamaterial to achieve an excellent successive absorption spectrum in the low- to mid-frequency range from 0.58kHz to 2.04kHz in the first order and 0.64kHz to 3.42kHz in the second order, respectively. The sound absorption performance at high temperatures is predicted by means of theoretical and numerical approaches, and the models are validated by experimental measurements at room temperature. This work provides insight and opportunities into the role of structural hierarchy in designing acoustic metamaterials equipped with extraordinary absorption properties, illustrating an unprecedented capability of the hierarchical acoustic metamaterial.
更多查看译文
关键词
hierarchical acoustic metamaterial,absorption,ultra-broadband
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要