Wide-Angle Broadband Nonreflecting Acoustic Metamaterial Fence
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© 2020 American Physical Society. In this work, we theoretically propose and experimentally demonstrate a kind of nonreflecting acoustic metamaterial fence that is perfectly impedance matched to air over a wide range of incident angles and a broad frequency band. The metamaterial fence is composed of an array of rigid cylinders with alternating layers of different cylinder diameters. It is designed by a spatially dispersive effective medium theory and experimentally demonstrated by airborne sound reflectance measurements. Our work provides a unique approach to design and realize rigid acoustic structures that can robustly prohibit reflection and reverberation. Such structures may have important applications in general acoustics.
Date issued
2020Department
Massachusetts Institute of Technology. Department of Mechanical EngineeringJournal
Physical Review Applied
Publisher
American Physical Society (APS)
Citation
Liu, Chenkai, Ma, Chu, Li, Xinhao, Luo, Jie, Fang, Nicholas X et al. 2020. "Wide-Angle Broadband Nonreflecting Acoustic Metamaterial Fence." Physical Review Applied, 13 (5).
Version: Final published version