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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Analysis and Evaluation of Impact Sound Insulation of Concrete Floor Structures in Response to Characteristics of Heavy-weight Impact Sources

중량충격원에 따른 콘크리트 바닥판의 차음특성 분석 및 평가에 관한 연구

  • 유승엽 (한양대학교 대학원 건축환경공학과) ;
  • 연준오 (한양대학교 대학원 건축환경공학과) ;
  • 전진용 (한양대학교 건축공학부)
  • Published : 2009.10.20
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Abstract

In this study, the impact force levels of bang machine and impact ball were measured, then the heavy-weight impact sounds generated by the bang machine and impact ball were investigated. It was found that the heavy-weight impact sources generated through modal excitation, and the impact force of the impact ball was similar to that of real impact source. The heavy-weight impact sounds were also measured in the real apartments with different slab thickness and floor structures. The results showed that the floor impact sound levels in terms of $L_{iFmax,AW}$, generated by impact ball sounds were reduced by using the resilient isolators. The frequency characteristics of heavy-weight impact sounds at 125 and 250 Hz were consistent with the characteristics of impact force spectrum. However, the difference between the impact sounds and the impact forces were found at 63 and 500 Hz due to the resonance of the floor structure and flanking noise, respectively.

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References

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