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http://dx.doi.org/10.7776/ASK.2011.30.2.092

Floor Impact Noise Characteristics Depending on the Experimental Conditions Using Impact Ball  

Lee, Won-Hak (한국건설기술연구원 건축계획환경연구실)
Haan, Chan-Hoon (충북대학교 건축공학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.30, no.2, 2011 , pp. 92-99 More about this Journal
Abstract
In Japan, bang machine has been considered to have problems about not only the impact force and frequency response which are different from the real impact sources such as children's jumping and running, but also damage in the wooden structure housing. Therefore, a new impactor for lower impact force to prevent demage in wooden structure housing was developed. The impact ball was adopted as the second standard impact source in JIS A 1418-2 and ISO 140-11. In the present study, floor impact sounds generated by impact ball with drop heights in four floors of mock-up building of Building Research Institute (BRI) similar to typical Japanese wooden structure housing were investigated and also compared to jumping sound. The results show that Impact ball sound dropped at 10 cm to 30 cm was most similar to jumping sound. And The impact sound levels at 250 and 500 Hz were more sensitive to drop height than other lower frequencies. The error that may occur from the difference of height of 10 cm up and down based on the standard drop height caused by the impact ball operated by human hands was approx. 1 dB or less only in its value of characteristic, but it must be carefully taken into Impact ball in the Korea Standard.
Keywords
Floor Impact Noise; Impact Ball; Wooden Floor Structure; Concrete Floor Structure;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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