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오양기(Oh Yang-Ki),주문기(Chu Mun-Ki),한명호(Han Myeong-Ho) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.3
The purpose of this study is to analyze the optimal design criteria for the maximum sound insulation performance of multi layer dry wall systems which use soundproof sheets made of natural materials such as stone dust. 18 different systems are designed and tested to investigate the impact of soundproof sheet, air gap, thickness of the panels, the stud and runner, and the total thickness of the system on sound insulation performance. As results, most of the systems have adequate performances in the accreditation scheme of Korean laws and regulations. Regardless of the position and the thickness, soundproof sheets affect positively on sound insulation performance. Better performances are also observed in all frequency bands by increasing the air gap, and especially in low frequency bands below 160㎐ and in around 2,000㎐ bands by the isolation of runners and studs.
이강성(Lee, Gang-Seong),주문기(Chu, Mun-Ki),고효인(Ko, Hyo-In),홍지영(Hong, Ji-Young),오양기(Oh, Yang-Ki) 한국건축친환경설비학회 2014 한국건축친환경설비학회 논문집 Vol.8 No.6
There are a couple of measurement standards in measuring the absorption coefficient of building materials. Impedance tube method and reverberation room method are those standardized absorption coefficient measurement methods. While applicable to the development stage of certain absorptive materials and the measurement of random incident absorption coefficient of multi layered absorption complex, they are unable to be applied to in-situ measurement. There are needs for the in-situ measurement for the assessment of the efficient of absorption materials and for the remodelling design of existing rooms. This research deals with an in-situ absorption coefficient measurement system which is based on the calculation of energy from impulse response of incident and reflected signal on the same axis
오양기(Oh Yang-Ki),조영운(Cho Young-Woon),주문기(Chu Mun-Ki) 한국건축친환경설비학회 2010 한국건축친환경설비학회 논문집 Vol.4 No.1
Due to the expansion of residential area and redevelopment of the city, the industrial area tends to be changed into residential area. It is often the case that only a part of the industrial area is changed to residential area while the other part remains as industrial area. There are complaints and even violent activities from the residents of changed residential area against the noise sources in the remained part of industrial area. while the noise emission level of the factories in the industrial area are keeping the emission standard of noise and vibration(Article No. 8) noticed from Ministry of Environment , it sometimes still exceed the regulation scheme of residential noise environment noticed by Ministry of Land, Transport and Maritime Affairs. In these basis, this study aims to check the changed residential area has a proper noise environment and to confirm the related regulations on noise performance have appropriate standards.
공동주택 현장 경량바닥충격음 차단성능 규준화의 문제점 및 대안
오양기(Oh, Yang-Ki),박병윤(Park, Byung Yun),주문기(Chu, Mun-Ki) 한국건축친환경설비학회 2014 한국건축친환경설비학회 논문집 Vol.8 No.3
The accreditation scheme for the floor impact noise insulation performance of apartments is announced officially in 2004 by Korea Ministry of Construction and Transportation. Though based on Korea Standard, KS, the accreditation scheme contains further restrictions to make definite legal criteria. This research raises questions on those restrictions whether they are adequate for assessing the floor impact sound pressure level.
영어 듣기평가 시험 장소로서의 고등학교 교실 소리환경의 현황 및 타당성
오양기(Oh, Yang Ki),노태학(Noh, Tae Hak),주문기(Chu, Mun Ki) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.4
It is often the case that various kinds of language listening tests are held in high school classrooms. They are TOEIC, TOEFL, and more sensitively, the nation wide university entrance examination. In reading and writing, students should be required to show their own ability in the same condition. But listening test is different. The test is influenced by the condition of listening environments. Currently, high school classrooms have a variety of listening environments. Size of classrooms, location and performance of loudspeakers, doors and windows location which may affect the background noise level, reverberation are the part of the factors which affect the listening environment. The differences in these factors may cause variety of the score, other than the actual listening ability of students. It is obvious that different listening environment may affect the students test scores. Students may get better scores in good environment, while worse in poor listening environments. The purpose of this study is to verify the listening condition of classrooms in high schools. Interviews and questionnaires on the actual response of students who took various kinds of tests in a variety of classrooms were collected. To match the listening condition to the score, a serious of listening tests and measurements on the acoustic condition were performed. The result shows that the score is strongly correlated to the listening environment of classrooms. This means that there must be a standard for the environment of listening tests, for the students to show their actual listening ability.