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Title |
Consideration on Rating Method for Heavy Impact Sound Taking Account of the Characteristics of Floor Vibration and Impact Sources
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Authors |
이민정(Min-Jung Lee) ; 최현기(Hyun-Ki Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.4.069 |
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Keywords |
맨바닥 슬래브 ; 바닥충격음레벨 ; 바닥진동 ; 충격원 ; 층간소음 ; 단일수치평가량 Concrete slab ; Floor impact sound pressure level ; Floor vibration ; Impact source ; Noise between floors ; Single number quantity |
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Abstract |
The purpose of this study is to reconsider the rating method for the floor impact sound insulation performance in current criterion. Although there are some arguments about proper standard heavy impact source with reproducibility of actual impact source in residence building, bang machine is adopted as the only standard heavy impact source in domestic criterion. To inspect the rating methods of evaluation criteria, this study conducted vibration test for both of standard heavy impact sources and actual impact sources. Using the test results, the floor impact sound insulation performance levels were assessed by each of several criteria. In addition, low frequency noise beyond current criteria was evaluated. Consequently, the floor impact sound levels have different performance levels according to adopted criteria, and measured floor impact sounds are bound to annoy the neighbors in the low frequency range. Current criteria does not consider the spectrum characteristics of floor impact sound according to impact sources and low frequency noise. This may cause the difference between the floor impact sound insulation performance level and human perception. Thus current criterion needs to be complemented to reflect the spectrum characteristics of floor impact sound levels according to impact sources and sound pressure levels in low frequency range.
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