한국소음진동공학회논문집 (Transactions of the Korean Society for Noise and Vibration Engineering)

  • 제27권2호
  • /
  • Pages.243-250
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  • 2017
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  • 1598-2785(pISSN)
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  • 2287-5476(eISSN)
한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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단일수치 평가방법에 따른 방음벽의 흡음성능 고찰

Sound Absorption Performance of Noise Barrier According to Single Number Rating Methods

  • 투고 : 2017.02.01
  • 심사 : 2017.02.28
  • 발행 : 2017.04.20
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초록

In this study, single number rating methods of sound absorption coefficients are discussed. After that the sound absorption performance of noise barriers which are classified by Korea Standard are analyzed according to several standards. The existing rating methods such as NRC (noise reduction coefficient), SAA (sound absorption average) or ${\alpha}_w$ (weighted sound absorption coefficient) from ASTM C423, KS F 3505 and ISO 11654 are introduced. The sound absorption performance of noise barrier is evaluated to compare NRC and ${\alpha}_w$ value. When the value is over 0.6 there are large variance between NRC and ${\alpha}_w$ value. As results, it is needed to unify single number rating methods of sound absorption coefficients for Korean standards on sound absorbing materials.

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참고문헌

  1. KS F 2805:2014, Measurement of Sound Absorption in a Reverberation Room.
  2. ISO 354:2003, Acoustics - Measurement of Sound Absorption in a Reverberation Room.
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