Search | Korea Science

Park, Chan-Youn;Park, In-Sun;Oh, Jong-Hwa;Park, Sang-Kyu
- Proceedings of the Korean Society for Noise and Vibration Engineering Conference
- /
- 2008.04a
- /
- pp.882-888
- /
- 2008
The increase in logistics and the emergence of high speed vehicles are aggravating the noise problem, and disturbing large numbers of people. Therefore, growing attention is being paid to the creation and utilization of a noise map in order to grasp and predict the influence of noise, and to establish a policy that effectively reduces noise. However, so far there has been little progress in developing a predictive formula for railway noise, and a noise prediction program suitable for the domestic environment. Therefore, there is a need for a method to apply the overseas prediction formula to domestic railway vehicles. This study evaluated the prediction method, the result of which is similar to that of a real measurement, using a noise map. It also employed a commercial software program, SoundPlan, to predict noise.
PDF

Kim, Sang-Min;Park, Woong;Ha, Jae-Hyoun
- Proceedings of the Korean Society for Noise and Vibration Engineering Conference
- /
- 2011.10a
- /
- pp.163-168
- /
- 2011
Noise map is drawn up under launch environment through analyzing jet noise of guided weapon in this research. This has an important significance in terms of having an opportunity to look at influence of noise which is caused by guided weapon in the surrounding environment. In this paper, the magnitude of jet noise that was measured by using microphone and the result of numerical analysis that was gained by using ENPro which is environment noise prediction program are shown. At this point estimation of noise source was based on ISO 9613. Finally noise map derived from results mentioned above will become useful material when setting safety guide for protecting hearing loss of operator of weapon system in the future.
PDF

Kim, Won-Jin;Yun, Jun-Ho
- Proceedings of the Korean Society for Noise and Vibration Engineering Conference
- /
- 2013.10a
- /
- pp.605-610
- /
- 2013
This study proposes an analysis model to simulate a noise map and estimate noise distribution for a location and its surroundings of a power plant. The noise map analysis was executed by using ENPro that is a commercial program for environmental noise prediction. Experimental evaluation for the proposed analysis model was carried out by comparing the results from noise analysis and measurement at several major points of the power plant and residential areas.
PDF

Choi, Sung Kyu;Lee, Byung Chan
- Transactions of the Korean Society for Noise and Vibration Engineering
- /
- v.24 no.10
- /
- pp.802-808
- /
- 2014
The purpose of this study is to suggest efficient methods for estimating population exposed to noises by analyzing differences of population exposed to noises estimated by each method through comparing exposed population estimated by utilizing existing methods and those estimated by using census output areas reflecting the actual population information of each address. For population exposed to noises, the error of exposed population estimated by using the per capita living space turned out to be the biggest, and other estimation methods had no significant difference. For population exposed to excess noises, as a result of analyzing population estimated by each method based on census output areas, the error of the method using a grid noise map turned out to be the biggest. For the method to estimate population exposed to noises by using a noise map, the estimation methods using census output areas and total ground area are considered to be more rational than the grid noise map estimation method or the method to estimate the living space per capita.
https://doi.org/10.5050/KSNVE.2014.24.10.802 인용 PDF KSCI KPUBS HTML

Kim, Seock-Hyun
- Proceedings of the Korean Society for Noise and Vibration Engineering Conference
- /
- 2002.11b
- /
- pp.498-504
- /
- 2002
Vibration beat phenomenon is theoretically investigated on a slightly asymmetric cylindrical shell, which is a simplified model of Korean bell. Mode pairs of the slightly asymmetric shell are obtained by receptance analysis and impulse response of the shell is derived using modal expansion and Laplace transform. Based on the impulse response model, beat mapping method is proposed to explain the reason that the beat of a bell vibration shows periodic distribution on the circumference. Beat characteristics of King Song-Dok Bell are explained in detail using the beat map and the measured modal data.
PDF