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Investigation of the sound insulation performance of walls and flanking noises in classrooms using field measurements
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현장실험을 통한 학교교실의 벽체 차음성능 및 측로전달소음 조사

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Type
Academic journal
Author
Ryu, Da-Jung (충북대학교 건축공학과) Park, Chan-Jae (충북대학교 건축공학과) Haan, Chan-Hoon (충북대학교 건축공학과)
Journal
The Acoustical Society Of Korea 한국음향학회지 한국음향학회지 제36권 제5호 KCI Accredited Journals
Published
2017.1
Pages
329 - 337 (9page)

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Investigation of the sound insulation performance of walls and flanking noises in classrooms using field measurements
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In USA and UK, the standards of both reverberation time and background noise level have been established for the appropriate aural environment in classrooms. In order to realize this, guidelines for architectural planning and interior finishing have been also suggested. However, in Korea, there has hardly been any guidelines for satisfying background noise criteria and investigation about sound insulation performance of current walls of classrooms. The present study investigates the structure of outer wall and walls between classrooms of two middle schools in order to analyze the sound insulation performance against both exterior and interior noises. Acoustic parameters including transmission loss, standardized sound level difference, and signal to noise ratio have been measured and analyzed for sound insulation performance of walls and flanking noises. As a result, concerning the walls in between classrooms, it was found that walls of dry construction have greater sound insulation performance rather than the walls of wet construction especially in mid and high frequency bands. Also, It was revealed that thermopane, insulated pair glass, of outer walls, has greater sound insulation performance than the double window consisted of two single pane glass. Regarding flanking noises, the standards were exceeded when all windows, or windows and doors front onto corridor were opened. It denotes that students could be disturbed with the sound transmission by the interior noises.
#교실 #차음성능 #측로전달소음 #투과손실 #가중 표준화 음압레벨차 #음향투과등급

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References (17)

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A. L. Bronzaft / 1981 / The effect of a noise abatement program on reading ability / J. Environmental Psychology 1:215~222 google schola J. E. Dockrell / 2006 / Acoustical barriers in classrooms: the impact of noise on performance in the classroom / British Educational Research Journal 32:509~525 google schola L. M. Ronsse / 2010 / Effects of noise from building mechanical systems on elementary school student achievement / ASHRAE 116:347~354 google schola H. Sato / 2008 / Evaluation of acoustical conditions for speech communication in working elementary school classrooms / J. Acoust. Soc. Am. 123:2064~2077 google schola 2010 / Acoustical Performance Criteria, Design Requirements, and Guidelines for Schools - Part 1 : Permanent Schools, American National Standard / ANSI/ASA S12.60 google schola

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