Abstract
In recent years study acoustic metamaterials have found great attention due to its enormous ability to guide and manipulate elastic wave in a medium. Frequency bandgap is a great feature that can be achieved by acoustic metamaterials. The bandgap is the frequency range at which the elastic wave doesn’t propagate through the medium. In another word, the frequency band gap offers wave isolation ability for a structure. An acoustic metamaterial usually consists of resonators and a host media. The frequency bandgap is mainly the result of brag scattering in the structure. The orientation and geometry of resonators in a unit cell possess a great influence on brag scattering. This study is dedicated to understanding the influence of resonators volume percentage in the frequency bandgap. Several resonator geometries of two different combinations are studied. Finally, comparing the outcome from both the combinations, a claim is made regarding the effect of volume fraction on frequency band gaps.
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