Absorption characteristics of sound proof wall by scrap aluminum and perforated plate
- Authors
- Lee, Young Jung; Kim, Dae-Gun; Park, Kyung Hwa; Kim, Young Do
- Issue Date
- Jul-2009
- Publisher
- 한국재료학회
- Keywords
- Noise reduction coefficient; Scrap aluminum chip; Scrap aluminum perforated plate; Sound absorption coefficient; Sound absorption property
- Citation
- Korean Journal of Materials Research (한국재료학회지), v.19, no.7, pp.382 - 385
- Indexed
- SCOPUS
KCI
- Journal Title
- Korean Journal of Materials Research (한국재료학회지)
- Volume
- 19
- Number
- 7
- Start Page
- 382
- End Page
- 385
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/176506
- DOI
- 10.3740/MRSK.2009.19.7.382
- ISSN
- 1225-0562
- Abstract
- Efforts to reduce noise in industrial application fields, such as automobiles, aircrafts, and plants have been gaining considerable attention while a sound proof wall to protect people from the noise has been intensively investigated by many researchers. In this study, our research group suggested creating a new sound proof wall composed of scrap aluminum chips and perforated plates in a commercial polyester sound proof wall, which was then successfully fabricated. This wall's sound absorption characteristics were measured by an impedance tube method. The sound absorption property was evaluated by measuring the Noise Reduction Coefficient (NRC) to the standard, ASTM C 423-90a. The noise reduction coefficient of the sound proof wall composed of 3.5 vol.% and 7.5 vol.% of scrap aluminum chips relatively increased to 5% and 8% compared to the commercial polyester sound proof wall. The scrap aluminum perforated plate also relatively increased to 13% compared to the commercial polyester sound proof wall.
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