Study on Sound-Insulation Performance of an Acoustic Metamaterial of Air-Permeable Multiple-Parallel-Connection Folding Chambers by Acoustic Finite Element Simulation
In order to achieve a balance between sound insulation and ventilation, a novel acoustic metamaterial of air-permeable multiple-parallel-connection folding chambers was proposed in this study that was based on Fano-like interference, and its sound-insulation performance was investigated through acou...
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MDPI AG
2023-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/12/4298 |
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| author | Wenqiang Peng Shaohua Bi Xinmin Shen Xiaocui Yang Fei Yang Enshuai Wang |
| author_facet | Wenqiang Peng Shaohua Bi Xinmin Shen Xiaocui Yang Fei Yang Enshuai Wang |
| author_sort | Wenqiang Peng |
| collection | DOAJ |
| description | In order to achieve a balance between sound insulation and ventilation, a novel acoustic metamaterial of air-permeable multiple-parallel-connection folding chambers was proposed in this study that was based on Fano-like interference, and its sound-insulation performance was investigated through acoustic finite element simulation. Each layer of the multiple-parallel-connection folding chambers consisted of a square front panel with many apertures and a corresponding chamber with many cavities, which were able to extend both in the thickness direction and in the plane direction. Parametric analysis was conducted for the number of layers <i>n<sub>l</sub></i> and turns <i>n<sub>t</sub></i>, the thickness of each layer <i>L</i><sub>2</sub>, the inner side lengths of the helical chamber <i>a</i><sub>1</sub>, and the interval <i>s</i> among the various cavities. With the parameters of <i>n<sub>l</sub></i> = 10, <i>n<sub>t</sub></i> = 1, <i>L</i><sub>2</sub> = 10 mm, <i>a</i><sub>1</sub> = 28 mm, and <i>s</i> = 1 mm, there were 21 sound-transmission-loss peaks in the frequency range 200–1600 Hz, and the sound-transmission loss reached 26.05 dB, 26.85 dB, 27.03 dB, and 33.6 dB at the low frequencies 468 Hz, 525 Hz, 560 Hz, and 580 Hz, respectively. Meanwhile, the corresponding open area for air passage reached 55.18%, which yielded a capacity for both efficient ventilation and high selective-sound-insulation performance. |
| first_indexed | 2024-03-11T02:12:01Z |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T02:12:01Z |
| publishDate | 2023-06-01 |
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| series | Materials |
| spelling | doaj.art-0403e8b6b6e747daa42f4ef6a5d5a44f2023-11-18T11:24:18ZengMDPI AGMaterials1996-19442023-06-011612429810.3390/ma16124298Study on Sound-Insulation Performance of an Acoustic Metamaterial of Air-Permeable Multiple-Parallel-Connection Folding Chambers by Acoustic Finite Element SimulationWenqiang Peng0Shaohua Bi1Xinmin Shen2Xiaocui Yang3Fei Yang4Enshuai Wang5College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaField Engineering College, Army Engineering University of PLA, Nanjing 210007, ChinaField Engineering College, Army Engineering University of PLA, Nanjing 210007, ChinaEngineering Training Center, Nanjing Vocational University of Industry Technology, Nanjing 210023, ChinaField Engineering College, Army Engineering University of PLA, Nanjing 210007, ChinaMIIT Key Laboratory of Multifunctional Lightweight Materials and Structures (MLMS), Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaIn order to achieve a balance between sound insulation and ventilation, a novel acoustic metamaterial of air-permeable multiple-parallel-connection folding chambers was proposed in this study that was based on Fano-like interference, and its sound-insulation performance was investigated through acoustic finite element simulation. Each layer of the multiple-parallel-connection folding chambers consisted of a square front panel with many apertures and a corresponding chamber with many cavities, which were able to extend both in the thickness direction and in the plane direction. Parametric analysis was conducted for the number of layers <i>n<sub>l</sub></i> and turns <i>n<sub>t</sub></i>, the thickness of each layer <i>L</i><sub>2</sub>, the inner side lengths of the helical chamber <i>a</i><sub>1</sub>, and the interval <i>s</i> among the various cavities. With the parameters of <i>n<sub>l</sub></i> = 10, <i>n<sub>t</sub></i> = 1, <i>L</i><sub>2</sub> = 10 mm, <i>a</i><sub>1</sub> = 28 mm, and <i>s</i> = 1 mm, there were 21 sound-transmission-loss peaks in the frequency range 200–1600 Hz, and the sound-transmission loss reached 26.05 dB, 26.85 dB, 27.03 dB, and 33.6 dB at the low frequencies 468 Hz, 525 Hz, 560 Hz, and 580 Hz, respectively. Meanwhile, the corresponding open area for air passage reached 55.18%, which yielded a capacity for both efficient ventilation and high selective-sound-insulation performance.https://www.mdpi.com/1996-1944/16/12/4298acoustic metamaterialair-permeable multiple-parallel-connection folding chambersFano-like interferenceacoustic finite element simulationsound insulation performanceparametric analysis |
| spellingShingle | Wenqiang Peng Shaohua Bi Xinmin Shen Xiaocui Yang Fei Yang Enshuai Wang Study on Sound-Insulation Performance of an Acoustic Metamaterial of Air-Permeable Multiple-Parallel-Connection Folding Chambers by Acoustic Finite Element Simulation Materials acoustic metamaterial air-permeable multiple-parallel-connection folding chambers Fano-like interference acoustic finite element simulation sound insulation performance parametric analysis |
| title | Study on Sound-Insulation Performance of an Acoustic Metamaterial of Air-Permeable Multiple-Parallel-Connection Folding Chambers by Acoustic Finite Element Simulation |
| title_full | Study on Sound-Insulation Performance of an Acoustic Metamaterial of Air-Permeable Multiple-Parallel-Connection Folding Chambers by Acoustic Finite Element Simulation |
| title_fullStr | Study on Sound-Insulation Performance of an Acoustic Metamaterial of Air-Permeable Multiple-Parallel-Connection Folding Chambers by Acoustic Finite Element Simulation |
| title_full_unstemmed | Study on Sound-Insulation Performance of an Acoustic Metamaterial of Air-Permeable Multiple-Parallel-Connection Folding Chambers by Acoustic Finite Element Simulation |
| title_short | Study on Sound-Insulation Performance of an Acoustic Metamaterial of Air-Permeable Multiple-Parallel-Connection Folding Chambers by Acoustic Finite Element Simulation |
| title_sort | study on sound insulation performance of an acoustic metamaterial of air permeable multiple parallel connection folding chambers by acoustic finite element simulation |
| topic | acoustic metamaterial air-permeable multiple-parallel-connection folding chambers Fano-like interference acoustic finite element simulation sound insulation performance parametric analysis |
| url | https://www.mdpi.com/1996-1944/16/12/4298 |
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