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Design Of Acoustic Metamaterials Based On The Concept Of Dual Transmission Line
Published in 2010
In this context, a one-dimensional acoustic transmission line, exhibiting metamaterial properties, is presented. It is composed of an acoustic waveguide, periodically loaded with membranes having the function of series capacitances, as well as transversally connected open channels (denoted stubs) having the function of shunt inductances. A validation of the transmission line design is made with the help of a finite-element model, the results of which are compared to a usual circuit description of the problem (transmission). A 10-cell long structure is implemented in COMSOL Multiphysics and confirms the good performances of the different models, in terms of effective medium parameters, as well as reflection and transmission coefficients.
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