Ventilated acoustic metasurface with low-frequency sound insulation

Yingxin Zhang; Yao Wei Chin; Xiang Yu; Milan Shrestha; Gih-Keong Lau; Boo Cheong Koo; Kun Liu; Zhenbo Lu

doi:10.1121/10.0020133

Ventilated acoustic metasurface with low-frequency sound insulation

JASA Express Lett. 2023 Jul 1;3(7):073602. doi: 10.1121/10.0020133.

Authors

Yingxin Zhang¹, Yao Wei Chin², Xiang Yu³, Milan Shrestha², Gih-Keong Lau⁴, Boo Cheong Koo², Kun Liu¹, Zhenbo Lu¹

Affiliations

¹ School of Aeronautics and Astronautics, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China.
² Department of Mechanical Engineering, National University of Singapore, Singapore 117411, Singapore.
³ Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong Special Administrative Region.
⁴ Department of Mechanical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwanzhangyx289@mail2.sysu.edu.cn, yaowei_chin@nus.edu.sg, lucien.yu@polyu.edu.hk, MILAN001@e.ntu.edu.sg, mgklau@ncyu.edu.tw, mpekbc@nus.edu.sg, liukun6@mail.sysu.edu.cn, luzhb7@mail.sysu.edu.cn.

PMID: 37486289
DOI: 10.1121/10.0020133

Abstract

A ventilated acoustic metasurface consisting of a membrane covered with a combination of different depth sub-chambers is proposed. It can achieve at least a 5 dB sound insulation acoustic performance in the wide frequency range from 100 to 1700 Hz, in particular a 10 dB noise reduction in the range from 100 to 200 Hz and from 437.4 to 1700 Hz, which can therefore cover the low-frequency range of the environmental noise. The physical mechanism of membrane-acoustic coupling for noise reduction in the low-frequency range is further explored.