Low-frequency sound absorption of a tunable multilayer composite structure
| Autor: | Jincheng He, Guoping Chen, Huan He, Zhu Jiang, Hanbo Shao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Absorption (acoustics)
Materials science business.industry Mechanical Engineering Infrasound Aerospace Engineering 02 engineering and technology 01 natural sciences law.invention Composite structure 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials law 0103 physical sciences Automotive Engineering Optoelectronics General Materials Science business 010301 acoustics Layer (electronics) Helmholtz resonator |
| Zdroj: | Journal of Vibration and Control. 28:2279-2287 |
| ISSN: | 1741-2986 1077-5463 |
| Popis: | Our work investigates a tunable multilayer composite structure for applications in the area of low-frequency absorption. This acoustic device is comprised of three layers, Helmholtz cavity layer, microperforated panel layer, and the porous material layer. For the simulation and experiment in our research, the absorber can fulfill a twofold requirement: the acoustic absorption coefficient can reach near 0.8 in very low frequency (400 Hz) and the range of frequency is very wide (400–3000 Hz). In all its absorption frequency, the average of the acoustic absorption coefficient is over 0.9. Besides, the absorption coefficient can be tunable by the scalable cavity. The multilayer composite structure in our article solved the disadvantages in single material. For example, small absorption coefficient in low frequency in traditional material such as microperforated panel and porous material and narrow reduction frequency range in acoustic metamaterial such as Helmholtz cavity. The design of the composite structure in our article can have more wide application than single material. It can also give us a novel idea to produce new acoustic devices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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