| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Physically Realizable Broadband Acoustic Metamaterials with Anisotropic Density |
| Zhi-Miao Lu, Li Cai, Ji-Hong Wen**, Xing Chen |
Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410073
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| Cite this article: |
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Zhi-Miao Lu, Li Cai, Ji-Hong Wen et al 2019 Chin. Phys. Lett. 36 024301 |
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Abstract Transformation acoustics are concentrated for the purpose of designing novel acoustic devices to tailor acoustic waves to achieve desirable characteristics. However, these devices require fluid or fluid-like materials with an anisotropic density that generally does not exist in nature. Therefore, we introduce pentamode metamaterials into an alternating multilayer isotropic medium model to build fluid-like metamaterials with an anisotropic density. A 2D acoustic bending based on transformation acoustics is established and investigated to verify our method. This idea provides a method to design broadband and physically realizable acoustic metamaterials with an anisotropic density and is meaningful for the design of acoustic metamaterials.
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Received: 29 October 2018
Published: 22 January 2019
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| PACS: |
43.35.+d
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(Ultrasonics, quantum acoustics, and physical effects of sound)
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43.20.+g
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(General linear acoustics)
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43.40.+s
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(Structural acoustics and vibration)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11004250 and 51275519. |
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