Low-Frequency Sound Absorption Potential of Subwavelength Absorbers Based on Coupled Micro-Slit Panels
Authors
-
Yujie QIAN
Hohai University,
China
0000-0002-6881-3759
- Zhengyuan GAO Hohai University, China
- Jie ZHANG Hohai University, China
Abstract
Due to space limitations during installation, reducing low-frequency noise has always been a challenging area. Sub-wavelength structures are typically favored in such scenarios for noise reduction. This paper explores the potential of micro-slit panels (MSP) for low-frequency sound absorption. To further optimize the panel thickness, coupled MSPs (CMSP) with a distance between two MSPs of less than 1 mm are proposed. Firstly, the low-frequency absorption performances of a single MSP based on two optimized schemes – the cavity-depth optimal scheme (COS) and the panel thickness optimal scheme (TOS) – are examined and compared with those of existing ultrathin metamaterials. The results demonstrate that MSP has significant potential for low frequency sound absorption, and COS allows for a smaller overall structural thickness but a larger panel thickness than TOS. Secondly, to reduce the panel thickness, the CMSP is developed and the theoretical model of its acoustic impedance is established and validated by experiments. Then, based on the theoretical model, the low-frequency absorption potential of CMSP is optimized using COS. The results show that both the overall thickness and the panel thickness of the CMSP absorber are reduced while maintaining better performance. Furthermore, the proposed absorber achieves a subwavelength scale since its total thickness can be as small as 0.138λ.Keywords:
coupled MSP (CMSP), cavity-depth optimal scheme (COS), panel thickness optimal scheme (TOS), low frequency, absorption performanceReferences
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7. Donda K., Zhu Y., Fan S.-W., Cao L., Li Y., Assouar B. (2019), Extreme low-frequency ultrathin acoustic absorbing metasurface, Applied Physics Letter, 115(17): 173506, https://doi.org/10.1063/1.5122704
8. Jiménez N., Romero-García V., Pagneux V., Groby J.-P. (2017a), Quasi-perfect absorption by subwavelength acoustic panels in transmission using accumulation of resonances due to slow sound, Physical Review Journals, 957: 014205, https://doi.org/10.1103/Phys RevB.95.014205.
9. Jiménez N., Romero-García V., Pagneux V., Groby J.-P. (2017b), Rainbow-trapping absorbers: Broadband, perfect and asymmetric sound absorption by subwavelength panels for transmission problems, Scientific Reports, 7: 13595, https://doi.org/10.1038/s41598-017-13706-4
10. Jiménez N., Huang W., Romero-García V., Pagneux V., Groby J.-P. (2016), Ultra-thin metamaterial for perfect and quasi-omnidirectional sound absorption, Applied Physics Letters, 109: 121902, https://doi.org/10.1063/1.4962328
11. Lara-Valencia L.A., Farbiarz-Farbiarz Y., Valencia-González Y. (2020), Design of a tuned mass damper inerter (TMDI) based on an exhaustive search optimization for structural control of buildings under seismic excitations, Shock and Vibration, 2020: 8875268, https://doi.org/10.1155/2020/8875268
12. Li Y., Assouar B.M. (2016), Acoustic metasurface-based perfect absorber with deep subwavelength thickness, Applied Physics Letter, 108(6): 063502, https://doi.org/10.1063/1.4941338
13. Liang Z.X., Li J. (2012), Extreme acoustic metamaterial by coiling up space, Physical Review Journals, 108: 114301, https://doi.org/10.1103/PhysRevLett.108.114301
14. Liu C.M., Xia B.Z., Yu D.J. (2017), The spiral-labyrinthine acoustic metamaterial by coiling up space, Physics Letters A, 381(36): 3112–3118, https://doi.org/10.1016/j.physleta.2017.07.041
15. Liu X., Wang C.Q., Zhang Y.M., Huang L.X. (2021a), Investigation of broadband sound absorption of smart micro-perforated panel (MPP) absorber, International Journal of Mechanical Sciences, 199: 106426, https://doi.org/10.1016/j.ijmecsci.2021.106426
16. Liu Y.Y., Ren S.W., Sun W., Lei Y., Wang H.T., Zeng X.Y. (2021b), Broadband low-frequency sound absorbing metastructures based on impedance matching coiled-up cavity, Applied Physics Letter, 119(10): 101901, https://doi.org/10.1063/5.0061012
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18. Maa D.Y. (1998), Potential of microperforated panel absorber, The Journal of the Acoustical Society of America, 104(5): 2861–2866, https://doi.org/10.1121/1.423870
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21. Park S.H. (2013), Acoustic properties of microperforated panel absorbers backed by Helmholtz resonators for the improvement of low-frequency sound absorption, Journal of Sound and Vibration, 332(20): 4895–4911, https://doi.org/10.1016/j.jsv.2013.04.029
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32. Zhu Y.F., Donda K., Fan S.W., Cao L.Y., Assouar B. (2019), Broadband ultra-thin acoustic metasurface absorber with coiled structure, Applied Physics Express, 12: 114002, https://doi.org/10.7567/1882-0786/ab494a
