Ultrathin arch-like labyrinthine acoustic metasurface for low-frequency sound absorption

Jung San Chen, Yu Ting Chung, Cheng Yi Wang, Wen Yang Lo, Chien Hao Liu, Chi Hua Yu, I. Ling Chang, Tzy Rong Lin

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In this study, a novel compact design for an acoustic metasurface containing coplanar arch-like channels (ALC) is proposed. The ALC is squeezed within a compact disk-shaped volume with a small thickness of 1/94th wavelength for absorbing undesired sound energy at low frequencies in limited-volume circumstances. An impedance-based analytical model is proposed and used for determining the absorption characteristics of arch-like channels with high accuracy. Compared with a uniform cross-section, varied channel widths can effectively lower the operating frequency. Furthermore, using multiple branches with different width arrangements can create a multi-peak absorption profile and effectively broaden the absorption bandwidth. The 3D printing technique is employed to fabricate test samples. The analytical and finite element predictions are verified by comparing those results with experimental measurements. The proposed structure has great potential for applications in noise abatement.

Original languageEnglish
Article number109142
JournalApplied Acoustics
Publication statusPublished - 2023 Jan

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics


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