| Autor: |
Xian-Hui Li, Xi-Wen Guan, Gai Xiaoling, Tuo Xing, Bin Zhang, Fang Wang, Ze-Nong Cai |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Applied Acoustics. 152:47-53 |
| ISSN: |
0003-682X |
| DOI: |
10.1016/j.apacoust.2019.03.021 |
| Popis: |
Microperforated panel (MPP) absorber were proposed by Maa for situation where a robust sound absorber was needed, without fibrous or porous material. Nowadays, it is relatively easy to design a MPP for providing sound absorption in a frequency band of a couple of octaves. However, the widespread use of MPPs as sound absorbers in the noise control industry is far from occurring. Because it is very difficult to fabricate thousands of sub-millimetric holes in a small scale, and the cost of fabrication is quite expensive. According to the heat shrinkage characteristics of heat shrinkable materials, a manufacturing process of MPP with ultra-micro holes was developed in this paper. The holes were made on the heat shrinkable sheets by traditional technology. After heat shrinkage, the holes with 20–80% smaller than that of traditional technology were obtained, and the processing of ultra-micro holes was realized. Process flow for making MPP with heat shrinkable materials is introduced. The manufacturing sample is displayed. Sound absorption properties of the MPP making by heat shrinkable materials are studied by the impedance tube experiment. The experimental results show that the MPP making by heat shrinkable materials has good sound absorption properties. The tensile strength for the sample of the heat shrinkable forming MPP structure was tested. The stress-strain curves of the heat-shrinkable MPP shows that the stress and strain are proportional to each other. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect