期刊
JOURNAL OF APPLIED PHYSICS
卷 118, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4922669
关键词
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资金
- National Basic Research Program of China [2012CB921504]
- SRFDP [20130091130004]
- NSFC [11474162, 11274171, 11274099, 11204145]
We demonstrate a design of two-dimensional density-near-zero (DNZ) membrane structure to control sound transmission. The membrane structure is theoretically modeled as a network of inductors and capacitors, and the retrieved effective mass density is confirmed to be close to zero at the resonance frequency. This scheme proposes a convenient way to construct the unit cell for achieving DNZ at the designed frequency. Further simulations clearly demonstrate that the membrane-network has the ability to control sound transmission such as achieving cloaking, high transmission through sharp corners, and high-efficient wave splitting. Different from the phononic-crystal-based DNZ materials, the compact DNZ membrane-network is in deep subwavelength scale and provides a strong candidate for acoustic functional devices. (c) 2015 AIP Publishing LLC.
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