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Absorption Characteristics of Sound Proof Wall by Scrap Aluminum and Perforated Plate

알루미늄칩과 타공판을 이용한 방음벽 충진재의 흡음특성

  • Lee, Young-Jung (Division of Materials Science and Engineering, Hanyang University) ;
  • Kim, Dae-Gun (Division of Materials Science and Engineering, Hanyang University) ;
  • Park, Kyung-Hwa (Poise & Compact Co.) ;
  • Kim, Young-Do (Division of Materials Science and Engineering, Hanyang University)
  • 이영중 (한양대학교 신소재공학부) ;
  • 김대건 (한양대학교 신소재공학부) ;
  • 박경화 ((주) 포이즈 앤 컴팩트) ;
  • 김영도 (한양대학교 신소재공학부)
  • Published : 2009.07.27

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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