Barrier-free duct muffler for low-frequency sound absorption
We demonstrate a duct muffler design that operates in the low-frequency range (<2000 Hz). The device contained a pair of coupled annular Helmholtz resonators (HRs) and porous material stuffing. HRs were installed as side branches of a circular tube to avoid affecting the ventilation. Porous m...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-09-01
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| Series: | Frontiers in Materials |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2022.991959/full |
| _version_ | 1811334771417022464 |
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| author | Cong Gao Cong Gao Chuandeng Hu Jun Mei Bo Hou Xianli Zhang Zhanhang Du Weijia Wen Weijia Wen |
| author_facet | Cong Gao Cong Gao Chuandeng Hu Jun Mei Bo Hou Xianli Zhang Zhanhang Du Weijia Wen Weijia Wen |
| author_sort | Cong Gao |
| collection | DOAJ |
| description | We demonstrate a duct muffler design that operates in the low-frequency range (<2000 Hz). The device contained a pair of coupled annular Helmholtz resonators (HRs) and porous material stuffing. HRs were installed as side branches of a circular tube to avoid affecting the ventilation. Porous materials were employed to form an asymmetric intrinsic loss in the HR pair and enable the device to achieve perfect sound absorption. An analytical model based on the temporal coupled-mode theory was derived, and a numerical simulation technique for structural design was introduced and verified. The experimental study demonstrated the effectiveness of the design methodology and illustrated that the device can achieve near-perfect sound absorption in the desired frequency range. A symmetrical configuration of the HRs also experimentally proved to be able to conduct sound absorption for sound incident from both sides of the duct. This study provides a solid foundation for the application of the designed muffler and an analytical explanation of the corresponding sound absorption mechanisms. |
| first_indexed | 2024-04-13T17:14:12Z |
| format | Article |
| id | doaj.art-cbd76b11a7b04293a24a97210b363c30 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-04-13T17:14:12Z |
| publishDate | 2022-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-cbd76b11a7b04293a24a97210b363c302022-12-22T02:38:11ZengFrontiers Media S.A.Frontiers in Materials2296-80162022-09-01910.3389/fmats.2022.991959991959Barrier-free duct muffler for low-frequency sound absorptionCong Gao0Cong Gao1Chuandeng Hu2Jun Mei3Bo Hou4Xianli Zhang5Zhanhang Du6Weijia Wen7Weijia Wen8Advanced Materials Thrust, Function Hub, Hong Kong University of Science and Technology (Guangzhou), Guangzhou, ChinaHKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Shenzhen, ChinaShenzhen Fantwave Tech. Co, Ltd, Shenzhen, ChinaSchool of Physics, South China University of Technology, Guangzhou, ChinaSchool of Physical Science and Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, ChinaDepartment of Physics, Hong Kong University of Science and Technology, Hong Kong, ChinaSchool of Physics, South China University of Technology, Guangzhou, ChinaAdvanced Materials Thrust, Function Hub, Hong Kong University of Science and Technology (Guangzhou), Guangzhou, ChinaHKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Shenzhen, ChinaWe demonstrate a duct muffler design that operates in the low-frequency range (<2000 Hz). The device contained a pair of coupled annular Helmholtz resonators (HRs) and porous material stuffing. HRs were installed as side branches of a circular tube to avoid affecting the ventilation. Porous materials were employed to form an asymmetric intrinsic loss in the HR pair and enable the device to achieve perfect sound absorption. An analytical model based on the temporal coupled-mode theory was derived, and a numerical simulation technique for structural design was introduced and verified. The experimental study demonstrated the effectiveness of the design methodology and illustrated that the device can achieve near-perfect sound absorption in the desired frequency range. A symmetrical configuration of the HRs also experimentally proved to be able to conduct sound absorption for sound incident from both sides of the duct. This study provides a solid foundation for the application of the designed muffler and an analytical explanation of the corresponding sound absorption mechanisms.https://www.frontiersin.org/articles/10.3389/fmats.2022.991959/fullhelmholtz resonatorduct mufflerventilation ductsound absorptionporous material |
| spellingShingle | Cong Gao Cong Gao Chuandeng Hu Jun Mei Bo Hou Xianli Zhang Zhanhang Du Weijia Wen Weijia Wen Barrier-free duct muffler for low-frequency sound absorption Frontiers in Materials helmholtz resonator duct muffler ventilation duct sound absorption porous material |
| title | Barrier-free duct muffler for low-frequency sound absorption |
| title_full | Barrier-free duct muffler for low-frequency sound absorption |
| title_fullStr | Barrier-free duct muffler for low-frequency sound absorption |
| title_full_unstemmed | Barrier-free duct muffler for low-frequency sound absorption |
| title_short | Barrier-free duct muffler for low-frequency sound absorption |
| title_sort | barrier free duct muffler for low frequency sound absorption |
| topic | helmholtz resonator duct muffler ventilation duct sound absorption porous material |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2022.991959/full |
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