Sound absorption effects in a rectangular enclosure with the foamed aluminum sheet absorber
- Authors
- Oh, Jae eung; Kim, Sang hun; Chung, Jin tai; Chung, Kyung ryul
- Issue Date
- Nov-1998
- Publisher
- KOREAN SOC MECHANICAL ENGINEERS
- Keywords
- absorption coefficient; admittance; foamed aluminum sheet absorber; normalized impedance; porous sound absorber; sound radiation
- Citation
- KSME INTERNATIONAL JOURNAL, v.12, no.6, pp.1017 - 1025
- Indexed
- SCIE
- Journal Title
- KSME INTERNATIONAL JOURNAL
- Volume
- 12
- Number
- 6
- Start Page
- 1017
- End Page
- 1025
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/47009
- DOI
- 10.1007/BF02942575
- ISSN
- 1011-8861
- Abstract
- For the purpose of finding out the optimal thickness of sound absorber and the sound absorption effects due to the selected thickness at an interested frequency range, the analytical study identifies the interior and exterior sound field characteristics of a rectangular enclosure with foamed aluminum lining and the experimental verification is performed with random noise input. By using a two-microphone impedance tube, we measure experimentally the absorption coefficient and the impedance of simple sound absorbing materials. Measured acoustical parameters of the test samples are applied to the theoretical analysis to predict sound pressure field in the cavity. The sound absorption effects from measurements are compared to predicted ones in both cases with and without foamed aluminum lining in the cavity of the rectangular enclosure.
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