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GIS DB와 LiDAR Dataset의 효율적인 결합에 의한 도로교통소음지도의 제작
박태호(Taeho Park),장채미(Chaemi Jang),장서일(Seo Il Chang),전범석(Bumseok Chun) 한국소음진동공학회 2018 한국소음진동공학회 논문집 Vol.28 No.4
In order to construct a road-traffic noise map of a city, which is a useful tool for policy making, a 3-D model of the city should be generated in advance. Since the 3-D model should include relevant roads and buildings of a city, the process requires time- and resource-consuming works. Especially, the heights of elevated roads and buildings cannot be obtained easily from the official data. In this study, DSM, DEM, and nDSM models generated from a LiDAR dataset are combined with GIS DB to estimate the heights more efficiently. This procedure was applied to the city of Gwangju to construct a road-traffic noise map, and by measuring the noise levels at 604 locations, the average difference between the measured and predicted noise levels was found within 1.7 ㏈(A). The 3-D modeling process combining LiDAR and GIS DB is expected to increase the efficiency of noise map construction.
청감실험을 통한 철도소음의 자율신경 및 심혈관계통 영향도 연구
이재관(Jae Kwan Lee),윤은선(Eun Sun Yoon),장채미(Chae Mi Jang),제세영(Sae Young Jae),장서일(Seo-Il Chang) 한국소음진동공학회 2016 한국소음진동공학회 논문집 Vol.26 No.6
According to the conventional studies on the noise and cardiovascular effect, railway noise is better associated with hypertension and adverse cardiovascular events than road traffic noise. But the underlying mechanisms remain unclear. We investigated the hypothesis that exposure to acute railway noise would the unfavorable effect of cardiovascular and autonomic system in healthy young subjects. Using a randomized, sham-controlled cross-over design, ten subjects were assigned to receive either an exposure to high speed train noise (84 ㏈) for 30 minutes or a control condition (non noise), separated by two days. Blood pressure, heart rate, augmentation index and heart rate variability as indices of cardiovascular and autonomic system function were measured at baseline, during, and recovery from two trials. The results show that exposure to acute railway noise significantly increased diastolic blood pressure and augmentation index, which may cause of adverse cardiovascular effects.
청감실험을 통한 철도소음의 자율신경 및 심혈관계통 영향도 연구
이재관(Jae Kwan Lee),윤은선(Eun Sun Yoon),장채미(Chae Mi Jang),제세영(Sae Young Jae),장서일(Seo-Il Chang) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.4
Traffic noise is the biggest part of the environmental noise. Railway noise is better associated with hypertension and adverse cardiovascular events than road traffic noise, but the underlying mechanisms remain unclear. We investigated the hypothesis that exposure to acute railway noise would the unfavorable effect of cardiovascular and autonomic system in healthy young subjects. Using a randomized, sham-controlled cross-over design, ten subjects were assigned to receive either an exposure to high speed train noise (84dB) for 30 minutes or a control condition (non noise), separated by two days. Blood pressure, heart rate, augmentation index and heart rate variability as indices of cardiovascular and autonomic system function were measured at baseline, during, and recovery from two trials. The results show that exposure to acute railway noise significantly increased diastolic blood pressure and augmentation index, which may cause of adverse cardiovascular effects.