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

한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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시편의 크기에 따른 흡음계수 변화 연구

A Study on the Sound Absorption Coefficient by Varying Sample Size

  • 정성수 (한국표준과학연구원 음향진동그룹) ;
  • 이우섭 (한국표준과학연구원 음향진동그룹) ;
  • 조문재 (한국표준과학연구원 음향진동그룹) ;
  • 서상준 (한국표준과학연구원 음향진동그룹)
  • 발행 : 2000.06.22
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초록

The sound absorption coefficient of glass wool (bulk density of 48 kg/$m^3$ and 32 kg/$m^3$) was measured by reverberation room method as varying their cross-sectional area. The results show that the absorption is larger for smaller samples because of edge effect. The absorption coefficient with two different kinds of sources, 1/3-octave band and white noise, gives similar values.

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