期刊
APPLIED PHYSICS LETTERS
卷 105, 期 12, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.4895617
关键词
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资金
- Natural Science and Engineering Research Council of Canada (NSERC)
- Research Accelerator Grant of The University of Western Ontario
Performance of classic sound absorbing materials strictly depends on their thickness, with a minimum of one-quarter wavelength to reach full sound absorption. In this paper, we report ultrathin sound absorbing panels that completely absorb sound energy with a thickness around one percent of wavelength. The strategy is to bend and coil up quarter-wavelength sound damping tubes into 2D coplanar ones, and embed them into a matrix to form sound absorbing panel. Samples have been designed and fabricated by 3D printing. Efficacies of sound absorption by these panels were validated through good agreement between theoretical analysis and experimental measurements. (C) 2014 AIP Publishing LLC.
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