Acoustic metacages for sound shielding with steady air flow

Chen Shen, Yangbo Xie, Junfei Li, Steven A. Cummer, Yun Jing

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


Conventional sound shielding structures typically prevent fluid transport between the exterior and interior. A design of a two-dimensional acoustic metacage with subwavelength thickness which can shield acoustic waves from all directions while allowing steady fluid flow is presented in this paper. The structure is designed based on acoustic gradient-index metasurfaces composed of open channels and shunted Helmholtz resonators. In-plane sound at an arbitrary angle of incidence is reflected due to the strong parallel momentum on the metacage surface, which leads to low sound transmission through the metacage. The performance of the proposed metacage is verified by numerical simulations and measurements on a three-dimensional printed prototype. The acoustic metacage has potential applications in sound insulation where steady fluid flow is necessary or advantageous.

Original languageEnglish (US)
Article number124501
JournalJournal of Applied Physics
Issue number12
StatePublished - Mar 28 2018

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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