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|Title:||Broadband acoustic energy confinement in hierarchical sonic crystals composed of rotated square inclusions||Authors:||Shakouri, Amir
|Issue Date:||2017||Source:||Shakouri, A., Xu, F., & Fan, Z. (2017). Broadband acoustic energy confinement in hierarchical sonic crystals composed of rotated square inclusions. Applied Physics Letters, 111(5), 054103-. doi:10.1063/1.4985230||Series/Report no.:||Applied Physics Letters||Abstract:||The propagation of acoustic waves in hierarchical sonic crystals is studied computationally and experimentally. These sonic crystals are composed of a hierarchical order of square inclusions rotated 45° with respect to the square lattice structure. It is shown that these hierarchical sonic crystals are capable of confining acoustic energy over a broad frequency range and at multiple lattice points inside the sonic crystal based on Bragg's scattering effect. Fused deposition modeling additive manufacturing is applied to prepare a finite-sized sample of the hierarchical sonic crystal. Acoustic measurements are conducted on the hierarchical sonic crystal sample in a direct and closely plane-wave field inside an anechoic room. The experimental measurements are in good agreement with the band structure calculated using the finite element method. Potential applications of the hierarchical sonic crystals for acoustic energy harvesting and noise measurements are discussed.||URI:||https://hdl.handle.net/10356/103327
|ISSN:||0003-6951||DOI:||10.1063/1.4985230||Rights:||© 2017 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The published version is available at: [http://dx.doi.org/10.1063/1.4985230]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||MAE Journal Articles|
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