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Acoustic Insulation Mechanism of Membrane-Type Acoustic Metamaterials Loaded with Arbitrarily Shaped Mass Blocks of Variable Surface Density

Membrane-type acoustic metamaterials (MAMs) have recently received widespread attention due to their good low-frequency sound-transmission-loss (STL) performance. A fast prediction method for the STL of rectangular membranes loaded with masses of arbitrary shapes and surface density values is propos...

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Detalles Bibliográficos
Autores principales: Li, Junyu, Shi, Yuanyuan, Jiang, Renjie, Zhang, Zhifu, Huang, Qibai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8877901/
https://www.ncbi.nlm.nih.gov/pubmed/35208099
http://dx.doi.org/10.3390/ma15041556
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author Li, Junyu
Shi, Yuanyuan
Jiang, Renjie
Zhang, Zhifu
Huang, Qibai
author_facet Li, Junyu
Shi, Yuanyuan
Jiang, Renjie
Zhang, Zhifu
Huang, Qibai
author_sort Li, Junyu
collection PubMed
description Membrane-type acoustic metamaterials (MAMs) have recently received widespread attention due to their good low-frequency sound-transmission-loss (STL) performance. A fast prediction method for the STL of rectangular membranes loaded with masses of arbitrary shapes and surface density values is proposed as a semi-analytical model for calculating the STL of membrane-type acoustic metamaterials. Through conformal mapping theory, the mass blocks of arbitrary shapes were transformed into regular shapes, which simplified the calculation model of acoustic propagation loss prediction, and the prediction results were verified by finite element simulations. The results show that the change in mass surface density was closely related to the size and frequency distribution of STL. The influence of the mass center on the STL and characteristic frequency of the film metamaterial is discussed.
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spelling pubmed-88779012022-02-26 Acoustic Insulation Mechanism of Membrane-Type Acoustic Metamaterials Loaded with Arbitrarily Shaped Mass Blocks of Variable Surface Density Li, Junyu Shi, Yuanyuan Jiang, Renjie Zhang, Zhifu Huang, Qibai Materials (Basel) Article Membrane-type acoustic metamaterials (MAMs) have recently received widespread attention due to their good low-frequency sound-transmission-loss (STL) performance. A fast prediction method for the STL of rectangular membranes loaded with masses of arbitrary shapes and surface density values is proposed as a semi-analytical model for calculating the STL of membrane-type acoustic metamaterials. Through conformal mapping theory, the mass blocks of arbitrary shapes were transformed into regular shapes, which simplified the calculation model of acoustic propagation loss prediction, and the prediction results were verified by finite element simulations. The results show that the change in mass surface density was closely related to the size and frequency distribution of STL. The influence of the mass center on the STL and characteristic frequency of the film metamaterial is discussed. MDPI 2022-02-18 /pmc/articles/PMC8877901/ /pubmed/35208099 http://dx.doi.org/10.3390/ma15041556 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Junyu
Shi, Yuanyuan
Jiang, Renjie
Zhang, Zhifu
Huang, Qibai
Acoustic Insulation Mechanism of Membrane-Type Acoustic Metamaterials Loaded with Arbitrarily Shaped Mass Blocks of Variable Surface Density
title Acoustic Insulation Mechanism of Membrane-Type Acoustic Metamaterials Loaded with Arbitrarily Shaped Mass Blocks of Variable Surface Density
title_full Acoustic Insulation Mechanism of Membrane-Type Acoustic Metamaterials Loaded with Arbitrarily Shaped Mass Blocks of Variable Surface Density
title_fullStr Acoustic Insulation Mechanism of Membrane-Type Acoustic Metamaterials Loaded with Arbitrarily Shaped Mass Blocks of Variable Surface Density
title_full_unstemmed Acoustic Insulation Mechanism of Membrane-Type Acoustic Metamaterials Loaded with Arbitrarily Shaped Mass Blocks of Variable Surface Density
title_short Acoustic Insulation Mechanism of Membrane-Type Acoustic Metamaterials Loaded with Arbitrarily Shaped Mass Blocks of Variable Surface Density
title_sort acoustic insulation mechanism of membrane-type acoustic metamaterials loaded with arbitrarily shaped mass blocks of variable surface density
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8877901/
https://www.ncbi.nlm.nih.gov/pubmed/35208099
http://dx.doi.org/10.3390/ma15041556
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