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최형일,정원삼,박싱일,김난희 조선대학교 환경공해연구소 2004 環境公害硏究 Vol.18 No.-
With improvement of the social life, noise and vibration, two of the habitat factors occurring in apartment buildings, gradually become more of a social problem. Causes of the pollution and its propagation paths are investigated in this study and counter measures are proposed to reflect at the early stage of planing and design through a case study for future apartment building design. Noise and vibration caused by the mechanical facilities of the apartment building are measured. The conclusions of this study are as followings. 1. The major causes of noise and vibration are combustion gas and heating apparatus, respectively. Noise and vibration may be delivered to the households by a complex process of the facilities. 2. To reduce the noise and vibration, countermeasures for propagation paths are provided and the estimated reduction of noise and vibration is presented in this study. 3. The building floors in this study are made of light-weight prefabricated concrete slab. Its isolation capacity of a crashing sound is L-80. This is the average level within 17 buildings made of light-weight forming concrete.
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최형일,정경훈,정원삼,박싱일,김난희 조선대학교 환경공해연구소 2006 環境公害硏究 Vol.19 No.1
These days, the way of life and peoples' values have been changing in a developing society. The noise pollution in residential areas is a serious problem caused by the drift of population to cities, increased density, and heavy traffic. The firing ranges, which were built 20 or 30 years ago, are required facilities but are threatening to people. They are a source of anxiety as they jeopardize the residents' safety and destroy their living. Because of this, problems arise often. To reduce the problems between the residents and the military, the sound level around the firing range, the location of the range, and training times are investigated as the following 1. When a howitwer is fired, if there is no obstacle, at distances of 70m and 120m, the equivalent noise level is +116㏈(A)Leq and 98.6㏈(A)Leq, respectively. When the distance is 120m, the maximum sound pressure level is 123㏈(A)Leq for a period of one second. 2. When a 105mm howitwer is fired, if there is a hill as a natural sound barrier and the distance between the firing location and the target location is far more than 900m. the equivalent sound level is below 62㏈(A)Leq. 3. Upon firing, the sound pressure levels have equal range. The sound level is higher at 500Hz and lOOOHz. 4. The sound pressure level of the noise of explosive sound decreases between the shooting point and the target point. At distances of lOOOm, 1400m, and 1450m, the equivalent sound levels are 86.2㏈(A)Leq, 85.4㏈(A)Leq and 84.2㏈(A)Leq each, and the highest sound pressure levels are 121.4㏈(A)Leq, 116㏈(A)Leq and 114.3㏈(A)Leq for one second. 5. The explosive sound at the target point is similar to the noise at the firing point. The sound pressure level also has an equal range. Also. the sound level is higher at 500Hz and 1OOOHz than the others.
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