• 한국음향학회지
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• 제42권3호
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• pp.181-188
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• 2023

일반적인 거주 공간에서 창호는 외부소음에 직접적으로 노출된다. 외부소음을 가장 효과적으로 저감할 수 있는 방법은 내부가 아닌 외부에서 바로 소음을 차단하는 방법이다. 태양 빛 차단을 위한 외부 블라인드는 다양하게 제품화되어 있지만, 우리나라에서는 아직 적극적으로 활용되지 못하고 있다. 앞선 연구에서는 차광용으로 제작된 외부 전동블라인드의 차음성능을 검증하기 위해 공인 실험실에서 실험하였다. 그 결과 일반창호 저감 성능 대비 6 dBA의 추가 차음성능을 검증하였다. 이 연구에서는 외부 전동블라인드의 차음성능을 실제 거주 공간 창호에 실증 적용하여 저감성능을 확인하고자 하였으며, 효과적인 소음저감 성능 추가확보를 위해 개선방안을 모색하고자 하였다. 실험결과, 외부 전동블라인드 자체의 저감 성능은 기본 창호 대비 1 dBA ~ 3 dBA 수준으로 미미했다. 하지만 블라인드 슬릿 사이의 틈새 충진을 통해 2 dBA 수준의 추가 저감성능을 확인하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2256-2262
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• 2011

In this study, sound transmission loss (STL) is investigated on the multi-layered windows used in the KTX-sancheon and next generation HEMU-400x high speed train. Using TLOSS, which is developed as a special purpose STL analysis program, STLs of the multi-layered glass windows are analytically investigated and compared with the mass law result. Window specimens for the two train models are manufactured and intensity transmission losses are measured based on ASTM E2249-02. The problems in aspect of sound insulation are diagnosed on the two window models. The aim of this study is to provide useful data for the improvement of the interior noise in the high speed train.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 춘계학술대회 논문집
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• pp.312-313
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• 2014

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 춘계학술대회논문집
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• pp.276-279
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• 2008

In order to measure sound transmission loss (STL) of a shipboard window of small size, a special partition is built into the test opening between two reverberation rooms and the specimen is placed in that partition. For high sound insulation, the filler wall often has multi-layered structure such as double-brick wall or buckhead structure with thick steel plate, absorptive material, and sandwich panels. This paper discusses the installation method of a multi-layered filler wall that consist of gypsum boards, lead plates, and glass wool. The experimental results of various wall structures are introduced. The comparison between the results show that the sound bridge effect plays a significant role in lowering the maximum STL of the filler wall. It is also found that the higher the sound insulation performance of the filler wall is, the more important the franking transmission through other side wall of the test facility is.

• 한국소음진동공학회논문집
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• 제19권12호
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• pp.1269-1280
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• 2009

This study was performed to construct sound performance DB of royal palace buildings and to examine the special quality more scientifically. Research target of royal palace were Changdeokgung and Gyeongbokgung. Sound insulation performance between the adjacent room and facade, room acoustics of Pyeonjeon and Chimjeon which is representative building in royal palace were examined through field measurement. Measured values of RT($T_{mf}$) at Pyeonjeon were 0.78 sec. and 1.03 sec. in Seonjeongjoen and Sajeongjoen, respectively. The RTs of both Pyeonjeon buildings were estimated suitable for speech and lecture considering their volume. The RT($T_{mf}$)s at Chimjeon were measured in range of 0.29~0.55 sec. This meant that the acoustic energy in rooms was decreased by sound transmission through mulberry paper(Hanji) of traditional windows and doors. As a sound insulation performance, the single-number quantities($D_{ls,2m,nT,w}$) of the building facades in Pyeonjeon and Chimjeon were measured 4~20 dB. Also the single-number quantities($D_{p,w}$) between the adjacent rooms in Chimjeon were measured 3~18 dB. Sound insulation performance of traditional building elements such as window and door depended strongly on their layers and area.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 추계학술대회논문집
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• pp.726-727
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• 2008

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 추계학술대회논문집
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• pp.724-727
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• 2008

• KIEAE Journal
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• 제9권1호
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• pp.99-106
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• 2009

This study aims to survey the acoustical environment in the region around airport where there are various transportation noises such as aircraft noise, railway noise and traffic noise, and to analyze the subjective response on the noise to the people who live in house or work in office nearby airport. Measurement and subjective response evaluation were carried out at the same time and outdoor noise level was measured all day long to calculate one day results such as average Leq or one day WECPNL etc. The results showed that the military aircraft produces very high level comparing with commercial aircraft, for instance the sound level of commercial outdoor was lower than that of military aircraft indoor. Double and triple window were more effective for controlling the noise than single window, which showed the possibility of sound insulation treatment by installing windows having higher sound insulation performance. Finally the subjective response was resulted that the most annoying noise is from aircraft and counterplan they hope is 'airport moving out'. Leq 65 dB(A), the criteria value of sound insulation treatment, was corresponding to the subjective response of median annoyance '4' out of 7th scale.

• 한국음향학회지
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• 제42권4호
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• pp.285-297
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• 2023

본 연구의 목적은 대한민국 학교 교실 중 학교공간혁신사업을 통해 도입된 9세 이하 초등학생이 사용하는 1, 2학년 창의융합교실의 음향성능을 조사하는 것이다. 이를 위해 창의융합교실 3개를 대상으로 음향성능을 측정하였다. 측정된 음향인자는 배경소음, 잔향시간(Reverberation Time, RT), 음성명료도(D₅₀), 음성전달지수(Speech Transmission Index, STI) 및 양이간 상호상관도(Inter-Aural Cross Correlation, IACC)였다. 또한 벽체의 차음성능분석을 위해 투과손실(Transmission Loss, TL), 표준화음압레벨차(D_nT) 등을 측정하였고, 교실의 문과 창문의 개폐 여부에 따른 소음레벨을 측정하였다. 그 결과, 배경소음은 공조기를 가동하지 않았을 때 평균 28.0 dB(A) ~ 32.8 dB(A)로 나타났으며 잔향시간은 0.6 s를 초과하지 않았다. 다양한 책상 배치에 따라 양이간 상호상관도(IACC)에 차이가 나타났는데, 중심선과 음원 근처 좌석에서 IACC 값이 높게 나타났다. 특히 음원을 정면으로 바라보는 중심선의 좌석에서 더 높은 IACC가 측정되었다. 문과 창문의 개폐에 따른 교실 내 소음레벨은 모든 창문과 문을 열었을 때와 복도측 창문과 문을 열었을 때 기준을 초과하였다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.102-107
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• 2009

Window system is an essential component for lighting, ventilation and thermal environment in buildings. Moreover, as balcony extension in apartment houses become legalized, the performance requirements of window systems in balcony space are getting complicated. However, at this moment, five properties of the windows are used to represent the performance aspects of the system, including wind resistance, air tightness, water tightness, sound insulation, thermal resistance. And such single properties are not capable to express the performance of a space with the window systems in terms of performance concept. A performance analysis with wholistic approach is required to see the effect of the window system in built environment. Thus, performance-based approach should be established, which will be able to evaluate the goal/function and comfort of occupants/owners. As the first step to develop the performance indicator for the window systme for balcony space, this study conducts a survey to find the required performance aspects. A complete set of performance-based indicators will be developed with verification methods in the later stage of research.