A lightweight low-frequency sound insulation membrane-type acoustic metamaterial
A novel membrane-type acoustic metamaterial with a high sound transmission loss (STL) at low frequencies (⩽500Hz) was designed and the mechanisms were investigated by using negative mass density theory. This metamaterial’s structure is like a sandwich with a thin (thickness=0.25mm) lightweight flexi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2016-02-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4942513 |
| _version_ | 1819118577391763456 |
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| author | Kuan Lu Jiu Hui Wu Dong Guan Nansha Gao Li Jing |
| author_facet | Kuan Lu Jiu Hui Wu Dong Guan Nansha Gao Li Jing |
| author_sort | Kuan Lu |
| collection | DOAJ |
| description | A novel membrane-type acoustic metamaterial with a high sound transmission loss (STL) at low frequencies (⩽500Hz) was designed and the mechanisms were investigated by using negative mass density theory. This metamaterial’s structure is like a sandwich with a thin (thickness=0.25mm) lightweight flexible rubber material within two layers of honeycomb cell plates. Negative mass density was demonstrated at frequencies below the first natural frequency, which results in the excellent low-frequency sound insulation. The effects of different structural parameters of the membrane on the sound-proofed performance at low frequencies were investigated by using finite element method (FEM). The numerical results show that, the STL can be modulated to higher value by changing the structural parameters, such as the membrane surface density, the unite cell film shape, and the membrane tension. The acoustic metamaterial proposed in this study could provide a potential application in the low-frequency noise insulation. |
| first_indexed | 2024-12-22T05:51:05Z |
| format | Article |
| id | doaj.art-d1a3a5bfcdbe4aa39c42a4c124730896 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-22T05:51:05Z |
| publishDate | 2016-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-d1a3a5bfcdbe4aa39c42a4c1247308962022-12-21T18:36:52ZengAIP Publishing LLCAIP Advances2158-32262016-02-0162025116025116-1010.1063/1.4942513064602ADVA lightweight low-frequency sound insulation membrane-type acoustic metamaterialKuan Lu0Jiu Hui Wu1Dong Guan2Nansha Gao3Li Jing4School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China.School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China.School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China.School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China.School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China.A novel membrane-type acoustic metamaterial with a high sound transmission loss (STL) at low frequencies (⩽500Hz) was designed and the mechanisms were investigated by using negative mass density theory. This metamaterial’s structure is like a sandwich with a thin (thickness=0.25mm) lightweight flexible rubber material within two layers of honeycomb cell plates. Negative mass density was demonstrated at frequencies below the first natural frequency, which results in the excellent low-frequency sound insulation. The effects of different structural parameters of the membrane on the sound-proofed performance at low frequencies were investigated by using finite element method (FEM). The numerical results show that, the STL can be modulated to higher value by changing the structural parameters, such as the membrane surface density, the unite cell film shape, and the membrane tension. The acoustic metamaterial proposed in this study could provide a potential application in the low-frequency noise insulation.http://dx.doi.org/10.1063/1.4942513 |
| spellingShingle | Kuan Lu Jiu Hui Wu Dong Guan Nansha Gao Li Jing A lightweight low-frequency sound insulation membrane-type acoustic metamaterial AIP Advances |
| title | A lightweight low-frequency sound insulation membrane-type acoustic metamaterial |
| title_full | A lightweight low-frequency sound insulation membrane-type acoustic metamaterial |
| title_fullStr | A lightweight low-frequency sound insulation membrane-type acoustic metamaterial |
| title_full_unstemmed | A lightweight low-frequency sound insulation membrane-type acoustic metamaterial |
| title_short | A lightweight low-frequency sound insulation membrane-type acoustic metamaterial |
| title_sort | lightweight low frequency sound insulation membrane type acoustic metamaterial |
| url | http://dx.doi.org/10.1063/1.4942513 |
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