Ultrathin low-frequency sound absorbing panels based on coplanar spiral tubes or coplanar Helmholtz resonators

Xiaobing Cai; Qiuquan Guo; Gengkai Hu; Jun Yang

doi:10.1063/1.4895617

Ultrathin low-frequency sound absorbing panels based on coplanar spiral tubes or coplanar Helmholtz resonators

Xiaobing Cai, Qiuquan Guo, Gengkai Hu, Jun Yang^*

^*Corresponding author for this work

School of Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

401 Citations (Scopus)

Abstract

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.

Original language	English
Article number	121901
Journal	Applied Physics Letters
Volume	105
Issue number	12
DOIs	https://doi.org/10.1063/1.4895617
Publication status	Published - 22 Sept 2014

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Cai, X., Guo, Q., Hu, G., & Yang, J. (2014). Ultrathin low-frequency sound absorbing panels based on coplanar spiral tubes or coplanar Helmholtz resonators. Applied Physics Letters, 105(12), Article 121901. https://doi.org/10.1063/1.4895617

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Ultrathin low-frequency sound absorbing panels based on coplanar spiral tubes or coplanar Helmholtz resonators

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