건축물의 차음특성 및 소음 전달경로의 평가에 관한 연구

윤세철(Se Cheol Yoon),이재동(Jae Dong Lee) 한국환경관리학회 1997 環境管理學會誌 Vol.4 No.-

컴퓨터 프로그램을 이용한 다목적홀의 실내음향 예측

윤세철(Se-Cheol Yoon),김태구(Tae-Gu Kim) 한국환경관리학회 1998 環境管理學會誌 Vol.4 No.2

공동주택 급배수 설비소음의 실태 및 저감방안에 관한 연구

김흥식,지용균,윤세철,Kim, Heung-Sik,Ji, Yong-Kyoun,Yoon, Se-Cheol 한국음향학회 1990 韓國音響學會誌 Vol.9 No.4

As the results of actual survey of indoor noise in apartment houses, it represents that plumbing noise and floor impact noise are most unsatisfactory factors to inhabitants. In this paper, the actual condition of plumbing noise in apartment houses was measured and the methods of plumbing noise reduction are suggested. For these suggestions, the actual survey of plumbing noise and the model test on structure-borne sound of water supply pipe and drain sound were carried out. 급 배수 설비소음은 공동주택 내부소음의 설문조사 결과, 상하층간 바닥충격음과 함께 거주자에게 두드러진 불만요소로써 나타나고 있다. 본 연구에서는 이러한 공동주택 급배수 설비소음의 실태를 측정하고 실태조사와 급수관의 고체전달음 및 배수음의 저감 모델 실험 결과를 중심으로 급배수 설비소음에 관한 공법상의 저감방안을 제시하였다.

오산천 상류 ( 신갈천 ) 의 오염원 저감을 위한 부하량 산정

오종민(Jong Min Oh),박재영(Jae Young Park),윤세철(Se Cheol Yoon) 한국수처리학회 1998 한국수처리학회지 Vol.6 No.2

This Study was performed to analyze the water quality from small urban stream and to restore the stream and the lake to the amenity environment by purifying urban stream. The amenity environment of the urban stream influences on ecosystem and the water quality of the lake. In this study sampling were set for the Shingal stream, the Jigok stream and the sewages which flow in the Shingal stream. The flux, pH, EC, concentration of DO, BOD, COD, NH₄-N, NO₂-N, NO₃-N, T-P, PO₄-P and Cl^- in stream were analyzed from April, 1995 to March, 1996. The results obtained from these investigations were as follows; The annual average pH was 7.63. Concentrations of SS, BOD, T-N and T-P were 10.6㎎/ℓ, 3.42㎎/ℓ, 8.58㎎/ℓ and 0.27㎎/ℓ at the upstream and 24.8㎎/ℓ, 16.64㎎/ℓ, 14.25㎎/ℓ and 0.88㎎/ℓ at the downstream, respectively. The pollutants loading investigated in Shingal stream were proved that SS, BOD, T-N and T-P were 922㎏/day, 620㎏/day, 525㎏/day and 33㎏/day, respectively. To improve the water quality of the Shingal stream and lake Shingal, we will construct wastewater treatment plant and use to methods of direct purification.

M대교 건설에 따른 도로교통소음의 예측

윤세철,오종민 경희대학교 환경연구소 1999 環境硏究 論文集 Vol.9 No.-

This study was carried out to predict and evaluate the traffic noise levels around the newly-founded M bridge. The noise levels at all locations around the M bridge and the habitat for the seasonal birds should meet 55 ㏈(A) as the noise level limit. The traffic noise levels by M bridge ranged from 59 ㏈(A) to 72 ㏈(A) in 2002 year and 61 ㏈(A) to 74 ㏈(A) in 2011 year. The counter-measure for noise control was reviewed as the barrier of tunnel type and the general barrier and the noise levels by noise control ranged from 41㏈(A) to 53 ㏈(A) in 2002 year, 41 ㏈(A) to 54 ㏈(A) in 2006 year, 43 ㏈(A) to 55 ㏈(A) in 2011 and 2016 year and 45 ㏈(A) to 58 ㏈(A) in 2016 year. As a result, the noise levels around M bridge in 2016 year was predicted to exceed the noise limit 55 ㏈(A) and the appropriate measures by the control of the traffic and the average vehicle speed required for the satisfaction of the noise limit.

밀폐에 의한 기계설비 소음의 감쇠 예측

윤세철,오종민 경희대학교 환경연구소 1997 環境硏究 論文集 Vol.7 No.-

The considerations in the noise control by enclosure are the rise of temperature and sound pressure, transmission loss, absorption coefficient of the materials, the structure of the soundproof panels, an opening and coincidence frequency. But it is very difficult that we obtain the accurate data about those in design, so, the noise reduction after enclosing does not correspond. The difference of the noise reduction between the calculation and the measurement was average 4.8dB

공동주택 바닥충격음 차단성능 평가

윤세철,오종민 慶熙大學校 地球環境硏究所 2002 지구환경논문집 Vol.13 No.-

In apartment buildings, floor-impact sound has been regarded as the major source which induces complaints from residents. It is mainly due to the use of light-weight structures and the lack of researches in terms of the sound transmission characteristics through the structures of a receiving room. The vibration produced by the impact on one part of an apartment building would travel as far as the other parts of structure only with with a little alleviation. As a result, the impact sound from upstairs has been regarded as a main source of noise causing discontentment among occupants. This study was carried out to measure the floor-impact sound levels and evaluate the insulation performance of floor-impact sound for the K apartment buildings which complaints induced and the newly-founded Y apartment buildings. The major results of this study are as followers; 1. The comparison showed that the light-impact sound levels and the levels of estimated light-impact sound ranged from 51.0dB to 73.9dB and 60dB to 66dB in the K apartment buildings, 50.2dB to 70.6dB and 57dB to 62dB in the Y apartment buildings. 2. The levels of estimated impact sound exceed the criteria of light-impact noise insulation 58dB by 6∼8dB and the criteria of heavy-impact noise insulation 50dB by 4∼6dB in the K apartment buildings and 4dB, 1dB in the Y apartment buildings, respectively.

지하철 운행구간중 D철교 주변지역의 소음도 예측에 관한 연구

윤세철,오종민,이해경 경희대학교 환경연구소 1998 環境硏究 論文集 Vol.8 No.-

This study was carried out to predict and evaluate the outdoor noise levels around the D railway bridge of the subway line. The counter-measure for noise control was reviewed as the tunnel. The outdoor noise levels are generally calculated by subtracting sound transmission loss of the tunnel envelope from indoor noise levels. The coefficient of sound absorption of tunnel envelope was NRC 0.6 and sound transmission loss STC 23. Prediction of the noise levels around the D railway bridge was achieved by dividing the circumference into 10m×l0m regular grid spaces. The indoor noise levels at the tunnel ranged from approximately 45dB(A) to l07dB(A) and the outdoor noise levels 37dB(A) to 67dB(A) as peak sound level. In this study the maximum sound level at all locations around the subway line should not exceed 60dB(A) as energy equivalent sound level(Leq). As a result all points around the D railway bridge satisfied the noise level limit with the above tunnel.

경기도 용인시(경희대학교) 주변지역의 지하수 오염현황

오종민,김홍석,진현오,윤세철 경희대학교 환경연구소 1998 環境硏究 論文集 Vol.8 No.-

Recently, the concern about groundwater pollution is increasing. And, groundwater was one of the major water resource used as drinking water by eighty percent of the world population, and its utility as industry water, agriculture water, fresh water was increasing. But, when pollution material was found in housing well, by purifying polluted water, the area of doing thorough conservation management was few. Thus, if water resource being regard as unlimited source, the right view of nature and scientific utility were essential because of the problem of its value. The purpose of this study was that investigated groundwater quality pollution condition in the part areas of Kyunggi-do Suwon Si, Yong-In Si, proposed to efficient management plan for pollution occurrence prevention and groundwater quality development by surveying groundwater pollution source. The result of the study was that the groundwater by use purpose could systematically manage water quality since development beginning, management system about groundwater development with use can established.

배달겨레의 윤리 도덕의 역사와 본바탕

이해경,윤세철 한국산업안전학회 1995 한국안전학회지 Vol.10 No.2

The silencers are used to attenuate noise generated by the exhaust fan for industrial processes. The types of silencers applied in this study are absorptive duct silencer, expansion chamber, absorptive chamber and resonator. This study was carried out to verify the attenuation by the various silencers and elements. As a result, the difference of attenuation between the calculation and the measurement was about 1∼7dB. The attenuation by absorptive duct silencer and absorptive chamber was negligible at frequencies below 250Hz. The expansion chamber should be used for low frequency applications where the absorptive duct silencer was ineffective. The attenuation by resonator may be realised when the ratio of frequency to resonant frequency approaches 1.