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2021 Vol.15, Issue 6 Preview Page

Research Article

A Study of the Repeatability and Reproducibility of in-situ Impact Sound Insulation by the Rubber Ball

고무공 충격원에 의한 현장조건 충격음 차단성능 반복성 및 재현성 고찰

Sin-Tae Kim1
,
Seoung-Bok Lee2
,
Hyun-Min Cho3
,
Myung-Jun Kim4*
김 신태1
,
이 성복2
,
조 현민3
,
김 명준4*
1Ph.D. Student, Department of Architectural Engineering, Graduate School, University of Seoul, Seoul, Korea
2Administrative Manager, Research Institute, Lotte Construction, Seoul, Korea
3Researcher, Architecture research group, Posco R&D center, Incheon, Korea
4Professor, Department of Architectural Engineering, University of Seoul, Seoul, Korea
1서울시립대학교 대학원 건축공학과 박사과정
2롯데건설 기술연구원 대리
3포스코건설 R&D센터 연구원
4서울시립대학교 건축학부 정교수, 공학박사
*Corresponding Author
30 December 2021. pp. 714-722
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Abstract

In Korea, floor impact sound performance evaluation is performed through bang machine, rubber ball and tapping machine. As for the rubber ball, which is heavy &soft impact source, the operator is measuring the performance by free-falling from 1m, so there are concerns about the deviation in the result value. Therefore, a study was conducted to understand the experimental accuracy of the rubber ball that may occur during field measurement, and this study was conducted to analyze the repeatability and reproducibility of the rubber ball under field conditions. As a result of the repeatability test of the rubber ball, there was a difference of less than about 1.2 dB in the measured results for each operator. In addition, the standard deviation of 0.5 dB below 400 Hz occurred in the test results of the same operator. A standard deviation of 0.7 to 2.4 dB occurred in the frequency band above 400 Hz. As a result of the reproducibility test, there was about 1 dB of deviation for each institution depending on the measuring equipment and analysis method. Therefore, it is judged that is necessary to minimize the influence of external noise and to present clear setting conditions for measurement equipment and analysis methods in order to perform on-site measurement on the rubber ball more accurately.

Keywords
Rubber ball
Repeatability
Reproducibility
Impact sound insulation
키워드
고무공 충격원
반복성
재현성
충격음 차단성능
References
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Information
  • Publisher :Korean Institute of Architectural Sustainable Environment and Building Systems
  • Publisher(Ko) :한국건축친환경설비학회
  • Journal Title :Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
  • Journal Title(Ko) :한국건축친환경설비학회논문집
  • Volume : 15
  • No :6
  • Pages :714-722
  • Received Date : 2021-11-17
  • Revised Date : 2021-11-30
  • Accepted Date : 2021-12-13
  • DOI :https://doi.org/10.22696/jkiaebs.20210060
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