Active control of membrane-type acoustic metamaterial by electric field

By employing a metal-coated central platelet and a rigid mesh electrode which is transparent to acoustic wave, we show that the membrane-type acoustic metamaterials (MAMs) can be easily tuned by applying an external voltage. With static voltage, the MAM's eigenfrequencies and therefore the phas...

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Published in:Applied physics letters 2015-03, Vol.106 (9)
Main Authors: Xiao, Songwen, Ma, Guancong, Li, Yong, Yang, Zhiyu, Sheng, Ping
Format: Article
Language:English
Subjects:
Acoustics
Active control
Applied physics
Coated electrodes
Electric potential
Metamaterials
Phase matching
Phase modulation
Resonant frequencies
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cited_by cdi_FETCH-LOGICAL-c358t-af1fceced34bf8270f61a3426bd9f2e055a2046831cde50c969edbdb8c55d3c23
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creator Xiao, Songwen
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Li, Yong
Yang, Zhiyu
Sheng, Ping
description By employing a metal-coated central platelet and a rigid mesh electrode which is transparent to acoustic wave, we show that the membrane-type acoustic metamaterials (MAMs) can be easily tuned by applying an external voltage. With static voltage, the MAM's eigenfrequencies and therefore the phase of the transmitted wave are tunable up to 70 Hz. The MAM's vibration can be significantly suppressed or enhanced by using phase-matched AC voltage. Functionalities such as phase modulation and acoustic switch with on/off ratio up to 21.3 dB are demonstrated.
doi_str_mv 10.1063/1.4913999
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP - American Institute of Physics
subjects Acoustics
Active control
Applied physics
Coated electrodes
Electric potential
Metamaterials
Phase matching
Phase modulation
Resonant frequencies
title Active control of membrane-type acoustic metamaterial by electric field
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