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Theoretical investigation of the sound attenuation of membrane-type acoustic metamaterials |
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| Authors: | Yuguang Zhang Jihong Wen Yong Xiao Xisen Wen Jianwei Wang |
| Institution: | 1. MOE Key Laboratory of Photonic and Phononic Crystals, and Institute of Mechatronical Engineering, National University of Defense Technology, Changsha, Hunan 410073, PR China;2. Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, Hunan 410073, PR China |
| Abstract: | Membrane-type acoustic metamaterials have been recently shown to exhibit good performance of sound attenuation in a low frequency range. An analytical approach for the fast calculation of sound transmission loss of the membrane-type acoustic metamaterials is presented here. The discussion indicate that the first transmission loss valley and the transmission loss peak depend strongly on the attaching mass, while the second transmission loss valley is mainly influenced by the membrane properties. The effects of membrane tension and mass position on the transmission loss and characteristic frequencies are also discussed in detail. |
| Keywords: | Acoustic metamaterials Membrane Sound attenuation Transmission loss |
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