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Multilayer Structures for High-intensity Sound Energy Absorption in Low-frequency Range by Junzhe Zhu; Hao Gao; Shoubo Dai; Yegao Qu; Guang Meng is a Engineering article available to read on EtoBox.
What is Multilayer Structures for High-intensity Sound Energy Absorption in Low-frequency Range about?
Although small-amplitude sound absorption problems have been comprehensively studied over the past decades, the high-intensity sound absorption problem in the low-frequency range remains unresolved. This paper is concerned with the design of a multilayer structure consisting of a main pore and hierarchical absorption layers to realize perfect absorption of high-intensity sound energy in the low-frequency range. The multilayer structure has enhanced energy dissipation ability in the high-intensity noise excitation environment due to vortex shedding in the sub-slits of the structure. An analytical model based on the equivalent fluid method is established for computing the nonlinear sound absorption coefficient of the structure. Effects of geometrical parameters on the sound absorption coefficient of the multilayer structure are investigated. It is found that under high-intensity sound excitation (e.g., 140 dB), the resistance of the multilayer structure grows along with the sound amplitude and renders a higher absorption coefficient, leading to great sound energy attenuation for high-intensity acoustic waves. The effective sound absorption coefficient of the designed structure is als
Who reads Multilayer Structures for High-intensity Sound Energy Absorption in Low-frequency Range?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Junzhe Zhu; Hao Gao; Shoubo Dai; Yegao Qu; Guang Meng
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)