Sound Absorption Enhancement by Thin Multi-Slit Hybrid Structures
We report an extraordinary sound absorption enhancement in low and intermediate frequencies achieved by a thin multi-slit hybrid structure formed by incorporating micrometer scale micro-slits into a sub-millimeter scale meso-slit matrix. Theoretical and numerical results reveal that this exotic phen...
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| Veröffentlicht in: | Chinese physics letters 2015, Vol.32 (1), p.91-94 |
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| container_title | Chinese physics letters |
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| creator | Ren, Shu-Wei Meng, Han Xin, Feng-Xian Lu, Tian-Jian |
| description | We report an extraordinary sound absorption enhancement in low and intermediate frequencies achieved by a thin multi-slit hybrid structure formed by incorporating micrometer scale micro-slits into a sub-millimeter scale meso-slit matrix. Theoretical and numerical results reveal that this exotic phenomenon is attributed to the noticeable velocity and temperature gradients induced at the junctures of the micro- and meso-slits, which cause significant loss of sound energy as a result of viscous and thermal effects. It is demonstrated that the proposed thin multi-slit hybrid structure with micro-scale configuration is capable of controling low frequency noise with large wavelength, which is attractive for applications where the size and weight of a sound absorber are restricted. |
| doi_str_mv | 10.1088/0256-307x/32/1/014302 |
| format | Article |
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Theoretical and numerical results reveal that this exotic phenomenon is attributed to the noticeable velocity and temperature gradients induced at the junctures of the micro- and meso-slits, which cause significant loss of sound energy as a result of viscous and thermal effects. 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| ispartof | Chinese physics letters, 2015, Vol.32 (1), p.91-94 |
| issn | 0256-307X 1741-3540 |
| language | eng |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link; Alma/SFX Local Collection |
| subjects | Absorption Hybrid structures Low frequencies Micrometers Noise control Sound Temperature effects Wavelengths 吸声 吸收器 应用程序 微米尺度 数值结果 毫米级 混合结构 温度梯度 |
| title | Sound Absorption Enhancement by Thin Multi-Slit Hybrid Structures |
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