Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)

  • 2002.05a
  • /
  • Pages.1071-1076
  • /
  • 2002
  • /
  • 1598-2548(pISSN)
The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Study of sound absorption characteristics using the sintered aluminium plate

알루미늄 소결재를 이용한 흡음 특성 연구

  • 노대호 (고려대학교 기계공학과) ;
  • 김재수 (한국과학기술연구원 금속공정연구센) ;
  • 윤진국 (한국과학기술연구원 금속공정연구센) ;
  • 강현주 (한국기계연구원 음향연구그) ;
  • 신종철 (고려대학교 기계공학) ;
  • 김원용 (한국과학기술연구원 금속공정연구센터)
  • Published : 2002.05.01
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Abstract

The purpose of this paper is to examine sound absorption characteristics of sintered Al(aluminum) plate. Comparison between experiment and theoretical analysts by using empirical formula are made. Based on comparison. it is found that Voronina model gives more reasonable explanation for sound absorption characteristics of sintered Al plates. Effect of air gap with varying the thickness of plates are also investigated, which concludes that the air gap generally increase absorption but for too thick thickness of Al plates. Al plates with air gap shows 0.85∼0.9 of NRC(Noise Reduction Coefficient) measured in reverberation room. which is comparable to glass wool. Comparison between normal and random Incident absorption shows that random incident absorption is higher than normal incident absorption.

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