Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/80647
Title: Sound absorption performance of the acoustic absorber fabricated by compression and microperforation of the porous metal
Authors: Bai, P
Yang, X
Shen, X 
Zhang, X
Li, Z
Yin, Q
Jiang, G
Yang, F
Keywords: Compression
Micromorphology
Microperforation
Porous metal
Sound absorption performance
Superposition absorption effect
Issue Date: 2019
Publisher: Elsevier
Source: Materials and design, 2019, v. 167, 107637 How to cite?
Journal: Materials and design 
Abstract: Novel acoustic absorbers were fabricated by the compression and microperforation of the porous metal, which aimed to develop practical acoustic absorbers for the noise reduction. Sound absorbing coefficients of the five investigated acoustic absorbers were measured by the AWA6128A detector according to the standing wave method, and their trends were consistent with normal sound absorption principle of the porous metal absorber and that of the microperforated panel absorber. The results proved that with same length of the cavity, sound absorption performance could be obviously improved by the compression and microperforation. When length of the cavity was 20 mm, average sound absorbing coefficient of the compressed and microperforated porous metal panel absorber in frequency range 100–6000 Hz reached 59.69%, which was superior to that 25.70% of original porous metal absorber and that 31.49% of the microperforated spring steel panel absorber. In the constructed semi-empirical model, a fourth-order polynomial function was treated as the coupling function to express the superposition absorption effect, and its veracity and reliability was validated by two replication experiments. Micromorphology of the compressed and microperforated porous metal panel provided the intuitive explanations to the improvement of its sound absorption performance.
URI: http://hdl.handle.net/10397/80647
ISSN: 0264-1275
EISSN: 1873-4197
DOI: 10.1016/j.matdes.2019.107637
Rights: © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
The following publication Bai, P., Yang, X., Shen, X., Zhang, X., Li, Z., Yin, Q., ... & Yang, F. (2019). Sound absorption performance of the acoustic absorber fabricated by compression and microperforation of the porous metal. Materials & Design, 167, 107637 is available at https://dx.doi.org/10.1016/j.matdes.2019.107637
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