On the evaluation of effective density for plate- and membrane-type acoustic metamaterials without mass attached.

Abstract

The effective densities of plate- and membrane-type acoustic metamaterials (AMMs) without mass attached are studied theoretically and numerically. Three models, including the analytic model (based on the plate flexural wave equation and the membrane wave equation), approximate model (under the low frequency approximation), and the finite element method (FEM… (More)
DOI: 10.1121/1.4960590

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