Low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillator
A bilayer membrane acoustic metamaterial was proposed to overcome the influence of the mass law on traditional acoustic materials and obtain a lightweight thin-layer structure that can effectively isolate low frequency noise. The finite element analysis (FEA) results agree well with the experimental...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-07-01
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| Series: | Theoretical and Applied Mechanics Letters |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095034917300788 |
| _version_ | 1811273165171589120 |
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| author | Nansha Gao Hong Hou Yihao Mu |
| author_facet | Nansha Gao Hong Hou Yihao Mu |
| author_sort | Nansha Gao |
| collection | DOAJ |
| description | A bilayer membrane acoustic metamaterial was proposed to overcome the influence of the mass law on traditional acoustic materials and obtain a lightweight thin-layer structure that can effectively isolate low frequency noise. The finite element analysis (FEA) results agree well with the experimental results. It is proved that the sound transmission losses (STLs) of the proposed structures are higher than those of same surface density acoustic materials. The introduction of the magnetic mass block is different from the traditional design method, in which only a passive mass block is fixed on the membrane. The magnetic force will cause tension in the membrane, increase membrane prestress, and improve overall structural stiffness. The effects of the geometry size on the STLs are discussed in detail. The kind of method presented in this paper can provide a new means for engineering noise control. Keywords: Bilayer membrane acoustic metamaterial, Low frequency sound insulation, Sound transmission loss, Magnet oscillator |
| first_indexed | 2024-04-12T22:54:14Z |
| format | Article |
| id | doaj.art-069eb3bfe41444648cef3ea042021311 |
| institution | Directory Open Access Journal |
| issn | 2095-0349 |
| language | English |
| last_indexed | 2024-04-12T22:54:14Z |
| publishDate | 2017-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Theoretical and Applied Mechanics Letters |
| spelling | doaj.art-069eb3bfe41444648cef3ea0420213112022-12-22T03:13:15ZengElsevierTheoretical and Applied Mechanics Letters2095-03492017-07-0174252257Low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillatorNansha Gao0Hong Hou1Yihao Mu2School of Marine Science and Technology, Northwestern Polytechnical University, Xiâan, 710072, China; State Key Laboratory for Strength and Vibration of Mechanical Structures, Xiâan Jiaotong University, Xiâan 710049, China; Corresponding author at: School of Marine Science and Technology, Northwestern Polytechnical University, Xiâan, 710072, China.School of Marine Science and Technology, Northwestern Polytechnical University, Xiâan, 710072, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xiâan, 710072, ChinaA bilayer membrane acoustic metamaterial was proposed to overcome the influence of the mass law on traditional acoustic materials and obtain a lightweight thin-layer structure that can effectively isolate low frequency noise. The finite element analysis (FEA) results agree well with the experimental results. It is proved that the sound transmission losses (STLs) of the proposed structures are higher than those of same surface density acoustic materials. The introduction of the magnetic mass block is different from the traditional design method, in which only a passive mass block is fixed on the membrane. The magnetic force will cause tension in the membrane, increase membrane prestress, and improve overall structural stiffness. The effects of the geometry size on the STLs are discussed in detail. The kind of method presented in this paper can provide a new means for engineering noise control. Keywords: Bilayer membrane acoustic metamaterial, Low frequency sound insulation, Sound transmission loss, Magnet oscillatorhttp://www.sciencedirect.com/science/article/pii/S2095034917300788 |
| spellingShingle | Nansha Gao Hong Hou Yihao Mu Low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillator Theoretical and Applied Mechanics Letters |
| title | Low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillator |
| title_full | Low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillator |
| title_fullStr | Low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillator |
| title_full_unstemmed | Low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillator |
| title_short | Low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillator |
| title_sort | low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillator |
| url | http://www.sciencedirect.com/science/article/pii/S2095034917300788 |
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