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Statistical models that can generate a road-traffic noise map for a city or area where only elementary urban design factors are determined, and where no concrete urban morphology, including buildings and roads, is given, can provide basic but essential information for developing a quiet and sustainable city. Long-term cost-effective measures for a quiet urban area can be considered at early city planning stages by using the statistical road-traffic noise map. An artificial neural network (ANN) and an ordinary least squares (OLS) model were developed by utilizing data on urban form indicators, based on a 3D urban model and road-traffic noise levels from a normal noise map of city A (Gwangju). The developed ANN and OLS models were applied to city B (Cheongju), and the resultant statistical noise map of city B was compared to an existing normal road-traffic noise map of city B. The urban form indicators that showed multi-collinearity were excluded by the OLS model, and among the remaining urban forms, road-related urban form indicators such as traffic volume and road area density were found to be important variables to predict the road-traffic noise level and to design a quiet city. Comparisons of the statistical ANN and OLS noise maps with the normal noise map showed that the OLS model tends to under-estimate road-traffic noise levels, and the ANN model tends to over-estimate them.
Phillip Kim; Hunjae Ryu; Jong-June Jeon; Seo Chang. Statistical Road-Traffic Noise Mapping based on Elementary Urban Forms in Two Cities of South Korea. Sustainability 2021, 13, 2365 .
AMA StylePhillip Kim, Hunjae Ryu, Jong-June Jeon, Seo Chang. Statistical Road-Traffic Noise Mapping based on Elementary Urban Forms in Two Cities of South Korea. Sustainability. 2021; 13 (4):2365.
Chicago/Turabian StylePhillip Kim; Hunjae Ryu; Jong-June Jeon; Seo Chang. 2021. "Statistical Road-Traffic Noise Mapping based on Elementary Urban Forms in Two Cities of South Korea." Sustainability 13, no. 4: 2365.
Minju Lee; In Kwon Park; Seo Il Chang; Jae Kwan Lee. Evaluating the Economic Value of Damages from Environment Noise: Analysis of Land Prices Around a Military Live-fire Complex. Transactions of the Korean Society for Noise and Vibration Engineering 2018, 28, 534 -541.
AMA StyleMinju Lee, In Kwon Park, Seo Il Chang, Jae Kwan Lee. Evaluating the Economic Value of Damages from Environment Noise: Analysis of Land Prices Around a Military Live-fire Complex. Transactions of the Korean Society for Noise and Vibration Engineering. 2018; 28 (5):534-541.
Chicago/Turabian StyleMinju Lee; In Kwon Park; Seo Il Chang; Jae Kwan Lee. 2018. "Evaluating the Economic Value of Damages from Environment Noise: Analysis of Land Prices Around a Military Live-fire Complex." Transactions of the Korean Society for Noise and Vibration Engineering 28, no. 5: 534-541.
Sustainable transportation is an essential part of a sustainable city; however, modern transportation systems with internal-combustion engines emits unacceptably high level of air-pollutants and noise. It is recognized widely that road-traffic noise has negative health impacts (such as annoyance and sleep disturbance) on exposed population in highly-populated cities. These harmful effects should be removed or at least reduced to guarantee the sustainability of modern cities. The estimation of pollutant levels at a specific location and the extent of the damage is therefore important for policy makers. This study presents a procedure to determine the levels of road-traffic noise at both day and night, and an assessment of the adverse health effects across Gwangju Metropolitan City (GMC), Republic of Korea (ROK). Road-traffic noise maps in 2-D and 3-D were generated, in order to find spatial distribution of noise levels across the city and noise level at the façade of a building-floor, respectively. The adoption of existing assessment models for the highly-annoyed (%HA) and highly-sleep-disturbed (%HSD) leads to building-based estimation of the affected population and spatial distribution of the road networks of the city. Very high noise levels were found to exist along major roads in the day and at night, with little difference between them. As a result, approximately 10% and 5% of the total population (n = 1,471,944) were estimated to experience high-level annoyance and sleep disturbance, respectively.
Taeho Park; Minho Kim; Chaemi Jang; Taeryang Choung; Kyung-A Sim; Dongju Seo; Seo Il Chang. The Public Health Impact of Road-Traffic Noise in a Highly-Populated City, Republic of Korea: Annoyance and Sleep Disturbance. Sustainability 2018, 10, 2947 .
AMA StyleTaeho Park, Minho Kim, Chaemi Jang, Taeryang Choung, Kyung-A Sim, Dongju Seo, Seo Il Chang. The Public Health Impact of Road-Traffic Noise in a Highly-Populated City, Republic of Korea: Annoyance and Sleep Disturbance. Sustainability. 2018; 10 (8):2947.
Chicago/Turabian StyleTaeho Park; Minho Kim; Chaemi Jang; Taeryang Choung; Kyung-A Sim; Dongju Seo; Seo Il Chang. 2018. "The Public Health Impact of Road-Traffic Noise in a Highly-Populated City, Republic of Korea: Annoyance and Sleep Disturbance." Sustainability 10, no. 8: 2947.
Taeho Park; Chaemi Jang; Seo Il Chang; Bumseok Chun. Road-traffic Noise Mapping by Combining GIS DB and LiDAR Dataset. Transactions of the Korean Society for Noise and Vibration Engineering 2018, 28, 483 -489.
AMA StyleTaeho Park, Chaemi Jang, Seo Il Chang, Bumseok Chun. Road-traffic Noise Mapping by Combining GIS DB and LiDAR Dataset. Transactions of the Korean Society for Noise and Vibration Engineering. 2018; 28 (4):483-489.
Chicago/Turabian StyleTaeho Park; Chaemi Jang; Seo Il Chang; Bumseok Chun. 2018. "Road-traffic Noise Mapping by Combining GIS DB and LiDAR Dataset." Transactions of the Korean Society for Noise and Vibration Engineering 28, no. 4: 483-489.
The trend of urbanization has attracted increased attention towards urban areas around the world. Central business districts (CBDs) serve as the core of commercial activities of urban areas and are often associated with high-density population. Noise pollution in urban areas, especially CBDs, is considered as an important issue for planners and policy makers especially with regard to human health. Noise prediction models for CBD area of Karachi, Pakistan, have been developed in this study using land use and traffic parameters. These models show that traffic and built-up space (especially residential land use) contribute positively and vacant space contributes negatively to the noise levels. However, it was found that traffic volume has higher impact, than land use, in terms of on noise levels in CBD area. The models of this research are anticipated to be used for planning of urban CBD areas in other cities where noise levels do not meet international health standards. In addition, they would be useful in calculating the rate of traffic volume associated with residential land use.
Mohammed Raza Mehdi; Mudassar Hassan Arsalan; Uneb Gazder; Minho Kim; Jeong Chang Seong; Anil Namdeo; Seo Il Chang. Who is the bigger culprit? Studying impacts of traffic and land use on noise levels in CBD area of Karachi, Pakistan. Environment, Development and Sustainability 2017, 20, 1421 -1438.
AMA StyleMohammed Raza Mehdi, Mudassar Hassan Arsalan, Uneb Gazder, Minho Kim, Jeong Chang Seong, Anil Namdeo, Seo Il Chang. Who is the bigger culprit? Studying impacts of traffic and land use on noise levels in CBD area of Karachi, Pakistan. Environment, Development and Sustainability. 2017; 20 (3):1421-1438.
Chicago/Turabian StyleMohammed Raza Mehdi; Mudassar Hassan Arsalan; Uneb Gazder; Minho Kim; Jeong Chang Seong; Anil Namdeo; Seo Il Chang. 2017. "Who is the bigger culprit? Studying impacts of traffic and land use on noise levels in CBD area of Karachi, Pakistan." Environment, Development and Sustainability 20, no. 3: 1421-1438.
The purpose of this study is to present a statistical model which can predict the noise level of road-traffic in urban area. A spatial statistical model which can take into account spatial dependency on geographically neighboring areas is constructed from a noise map of a city in South Korea. A system of 250m×250m grid cells is placed on the city of Cheongju, South Korea, and the noise level and urban form indicators are averaged over each cell. The population-weighted mean of the noise level is subsequently regressed on the average urban form by adopting the spatial autoregressive model (SAR) and the spatial error model (SEM), as well as an ordinary least squares (OLS) model. Direct and indirect impacts are analyzed for a valid interpretation of the spatial statistical models. Factors such as GSI, FSI, traffic volume, traffic speed, road area density, and the fraction of industrial area turn out to have significant impacts on the noise level
Hunjae Ryu; In Kwon Park; Bum Seok Chun; Seo Il Chang. Spatial statistical analysis of the effects of urban form indicators on road-traffic noise exposure of a city in South Korea. Applied Acoustics 2017, 115, 93 -100.
AMA StyleHunjae Ryu, In Kwon Park, Bum Seok Chun, Seo Il Chang. Spatial statistical analysis of the effects of urban form indicators on road-traffic noise exposure of a city in South Korea. Applied Acoustics. 2017; 115 ():93-100.
Chicago/Turabian StyleHunjae Ryu; In Kwon Park; Bum Seok Chun; Seo Il Chang. 2017. "Spatial statistical analysis of the effects of urban form indicators on road-traffic noise exposure of a city in South Korea." Applied Acoustics 115, no. : 93-100.
Jae Kwan Lee; Eun Sun Yoon; Chae Mi Jang; Sae Young Jae; Seo-Il Chang. The Research of Railway Noise through Auditory Experiments Focused on the Autonomic Nervous System and Cardiovascular System. Transactions of the Korean Society for Noise and Vibration Engineering 2016, 26, 674 -679.
AMA StyleJae Kwan Lee, Eun Sun Yoon, Chae Mi Jang, Sae Young Jae, Seo-Il Chang. The Research of Railway Noise through Auditory Experiments Focused on the Autonomic Nervous System and Cardiovascular System. Transactions of the Korean Society for Noise and Vibration Engineering. 2016; 26 (6):674-679.
Chicago/Turabian StyleJae Kwan Lee; Eun Sun Yoon; Chae Mi Jang; Sae Young Jae; Seo-Il Chang. 2016. "The Research of Railway Noise through Auditory Experiments Focused on the Autonomic Nervous System and Cardiovascular System." Transactions of the Korean Society for Noise and Vibration Engineering 26, no. 6: 674-679.
Taeho Park; Bumseok Chun; Seo Il Chang. Extraction of Three-dimensional Hybrid City Model based on Airborne LiDAR and GIS Data for Transportation Noise Mapping. Transactions of the Korean Society for Noise and Vibration Engineering 2014, 24, 985 -991.
AMA StyleTaeho Park, Bumseok Chun, Seo Il Chang. Extraction of Three-dimensional Hybrid City Model based on Airborne LiDAR and GIS Data for Transportation Noise Mapping. Transactions of the Korean Society for Noise and Vibration Engineering. 2014; 24 (12):985-991.
Chicago/Turabian StyleTaeho Park; Bumseok Chun; Seo Il Chang. 2014. "Extraction of Three-dimensional Hybrid City Model based on Airborne LiDAR and GIS Data for Transportation Noise Mapping." Transactions of the Korean Society for Noise and Vibration Engineering 24, no. 12: 985-991.
Hun Jae Ryu; Joon Hee Ko; Seo Il Chang; Byung Chan Lee. A Study on Sampling Techniques to Assure the Representativeness of Short-term Equivalent Noise Level. Transactions of the Korean Society for Noise and Vibration Engineering 2012, 22, 1213 -1219.
AMA StyleHun Jae Ryu, Joon Hee Ko, Seo Il Chang, Byung Chan Lee. A Study on Sampling Techniques to Assure the Representativeness of Short-term Equivalent Noise Level. Transactions of the Korean Society for Noise and Vibration Engineering. 2012; 22 (12):1213-1219.
Chicago/Turabian StyleHun Jae Ryu; Joon Hee Ko; Seo Il Chang; Byung Chan Lee. 2012. "A Study on Sampling Techniques to Assure the Representativeness of Short-term Equivalent Noise Level." Transactions of the Korean Society for Noise and Vibration Engineering 22, no. 12: 1213-1219.
Environmental noise is a major source of public complaints. Noise in the community causes physical and socio-economic effects and has been shown to be related to adverse health impacts. Noise, however, has not been actively researched in the United States compared with the European Union countries in recent years. In this research, we aimed at modeling road traffic noise and analyzing human exposure in Fulton County, Georgia, United States. We modeled road traffic noise levels using the United States Department of Transportation Federal Highway Administration Traffic Noise Model implemented in SoundPLAN®. After analyzing noise levels with raster, vector and façade maps, we estimated human exposure to high noise levels. Accurate digital elevation models and building heights were derived from Light Detection And Ranging survey datasets and building footprint boundaries. Traffic datasets were collected from the Georgia Department of Transportation and the Atlanta Regional Commission. Noise level simulation was performed with 62 computers in a distributed computing environment. Finally, the noise-exposed population was calculated using geographic information system techniques. Results show that 48% of the total county population [N = 870,166 residents] is potentially exposed to 55 dB(A) or higher noise levels during daytime. About 9% of the population is potentially exposed to 67 dB(A) or higher noises. At nighttime, 32% of the population is expected to be exposed to noise levels higher than 50 dB(A). This research shows that large-scale traffic noise estimation is possible with the help of various organizations. We believe that this research is a significant stepping stone for analyzing community health associated with noise exposures in the United States.
Jeong C. Seong; Tae H. Park; Joon H. Ko; Seo Chang; Minho Kim; James B. Holt; Mohammed R. Mehdi. Modeling of road traffic noise and estimated human exposure in Fulton County, Georgia, USA. Environment International 2011, 37, 1336 -1341.
AMA StyleJeong C. Seong, Tae H. Park, Joon H. Ko, Seo Chang, Minho Kim, James B. Holt, Mohammed R. Mehdi. Modeling of road traffic noise and estimated human exposure in Fulton County, Georgia, USA. Environment International. 2011; 37 (8):1336-1341.
Chicago/Turabian StyleJeong C. Seong; Tae H. Park; Joon H. Ko; Seo Chang; Minho Kim; James B. Holt; Mohammed R. Mehdi. 2011. "Modeling of road traffic noise and estimated human exposure in Fulton County, Georgia, USA." Environment International 37, no. 8: 1336-1341.
In this study, a scheme to develop a noise map and noise impact assessment method using GIS has been suggested. After developing a road-traffic noise map for the city of Chungju, Republic of Korea, noise impact assessment was performed through analyzing the map. A 3-dimensional terrain model was generated using digital maps and building models were prepared using the information from draft and digital maps. To develop a noise evaluation model, a noise-source map for each road was generated. The noise levels at 25 locations close to roads were measured and compared with the expected noise levels to verify the developed noise map. An excess noise map was generated by comparing the road-traffic noise map with a noise-standard map. Using the excess noise map, the areas exceeding environmental noise standards were effectively evaluated through a GIS space analysis. The 3-dimensional facade noise map was generated to calculate the number of people exposed to a certain noise level.
Joon Hee Ko; Seo Il Chang; Byung Chan Lee. Noise impact assessment by utilizing noise map and GIS: A case study in the city of Chungju, Republic of Korea. Applied Acoustics 2011, 72, 544 -550.
AMA StyleJoon Hee Ko, Seo Il Chang, Byung Chan Lee. Noise impact assessment by utilizing noise map and GIS: A case study in the city of Chungju, Republic of Korea. Applied Acoustics. 2011; 72 (8):544-550.
Chicago/Turabian StyleJoon Hee Ko; Seo Il Chang; Byung Chan Lee. 2011. "Noise impact assessment by utilizing noise map and GIS: A case study in the city of Chungju, Republic of Korea." Applied Acoustics 72, no. 8: 544-550.
Using noise prediction models, we explored the transportation noise levels of Youngdeungpo-gu, an urbanized area of Seoul Metropolitan City in the Republic of Korea. In addition, we estimated the population exposed to transportation noise levels and determined how many people are vulnerable to noise levels that would cause serious annoyance and sleep disturbance. Compared with the World Health Organization [WHO] recommended levels, the daytime and nighttime transportation noise levels were still high enough to have the two psychosocial effects on people when considering the recommended levels of the World Health Organization (WHO; 55 decibels [dB[A]] and 40 dB[A] for daytime and nighttime, respectively). Particularly, nighttime transportation noise was discovered to be harmful to a wider area and more people than daytime noise. Approximately 91% of the Youngdeungpo-gu area experienced nighttime transportation noise levels exceeding those recommended by WHO. It was estimated that as much as 80% of the people in the study area were exposed to transportation noise levels > 40 dB[A] during nighttime. Taking this into account, there is an urgent need to control and reduce transportation noise levels in Seoul, to protect residents against the potential ill health effects caused by urban transportation.
Joon Hee Ko; Seo Il Chang; Minho Kim; James B. Holt; Jeong C. Seong. Transportation noise and exposed population of an urban area in the Republic of Korea. Environment International 2011, 37, 328 -334.
AMA StyleJoon Hee Ko, Seo Il Chang, Minho Kim, James B. Holt, Jeong C. Seong. Transportation noise and exposed population of an urban area in the Republic of Korea. Environment International. 2011; 37 (2):328-334.
Chicago/Turabian StyleJoon Hee Ko; Seo Il Chang; Minho Kim; James B. Holt; Jeong C. Seong. 2011. "Transportation noise and exposed population of an urban area in the Republic of Korea." Environment International 37, no. 2: 328-334.
Jin-Hee Son; Kun Lee; Tae-Ryang Choung; Seo-Il Chang. Application Method of Logistic Regression Analysis for Annoyance Prediction Model Based on Predicted Noise Level. Transactions of the Korean Society for Noise and Vibration Engineering 2010, 20, 555 -561.
AMA StyleJin-Hee Son, Kun Lee, Tae-Ryang Choung, Seo-Il Chang. Application Method of Logistic Regression Analysis for Annoyance Prediction Model Based on Predicted Noise Level. Transactions of the Korean Society for Noise and Vibration Engineering. 2010; 20 (6):555-561.
Chicago/Turabian StyleJin-Hee Son; Kun Lee; Tae-Ryang Choung; Seo-Il Chang. 2010. "Application Method of Logistic Regression Analysis for Annoyance Prediction Model Based on Predicted Noise Level." Transactions of the Korean Society for Noise and Vibration Engineering 20, no. 6: 555-561.
To study annoyance response to combined transportation noise from road‐traffic and railway, a social survey has been performed in a highly populated residential area in the city of Seoul, South Korea. To determine the noise exposure level in an interviewed household, a noise mapping software package was utilized and the noise exposure level from each single source was calculated separately and combined to get total exposure level. The prediction was partially validated by measurements. The households in the study area are classified into acoustically differentiated groups which are named as the road‐traffic noise dominant, railway noise dominant, and combined noise dominant, respectively. %HA (percentage of highly annoyed people) curves to noise exposure level are presented for the acoustically classified three groups. Comparison of the %HA curves shows that more people are highly annoyed to railway noise than road‐traffic noise, but the curve for combined noise is much closer to the %HA curve for road‐traffic noise rather than the %HA curve for railway noise. Multiple‐regression and path analysis of the survey data give the direct and indirect quantitative relationships between annoyance and noise and non‐noise factors. Personal sensitivity to noise and satisfaction of living environment are primary contributing factors.
Jin-Hee Son; Tae-Ho Park; Joon-Hee Ko; Seo Il Chang; Kun Lee. Annoyance response to mapped noise from combined road‐traffic and railway system. The Journal of the Acoustical Society of America 2010, 127, 1777 -1777.
AMA StyleJin-Hee Son, Tae-Ho Park, Joon-Hee Ko, Seo Il Chang, Kun Lee. Annoyance response to mapped noise from combined road‐traffic and railway system. The Journal of the Acoustical Society of America. 2010; 127 (3):1777-1777.
Chicago/Turabian StyleJin-Hee Son; Tae-Ho Park; Joon-Hee Ko; Seo Il Chang; Kun Lee. 2010. "Annoyance response to mapped noise from combined road‐traffic and railway system." The Journal of the Acoustical Society of America 127, no. 3: 1777-1777.
Joon-Hee Ko; Seo-Il Chang; Jin-Hee Son; Kun Lee. Study on the Annoyance Response in the Area Exposed by Road Traffic Noise and Railway Noise. Transactions of the Korean Society for Noise and Vibration Engineering 2010, 20, 172 -178.
AMA StyleJoon-Hee Ko, Seo-Il Chang, Jin-Hee Son, Kun Lee. Study on the Annoyance Response in the Area Exposed by Road Traffic Noise and Railway Noise. Transactions of the Korean Society for Noise and Vibration Engineering. 2010; 20 (2):172-178.
Chicago/Turabian StyleJoon-Hee Ko; Seo-Il Chang; Jin-Hee Son; Kun Lee. 2010. "Study on the Annoyance Response in the Area Exposed by Road Traffic Noise and Railway Noise." Transactions of the Korean Society for Noise and Vibration Engineering 20, no. 2: 172-178.
Shi-Won Lee; Seo Il Chang; Young-Min Park. Utilizing noise mapping for environmental impact assessment in a downtown redevelopment area of Seoul, Korea. Applied Acoustics 2008, 69, 704 -714.
AMA StyleShi-Won Lee, Seo Il Chang, Young-Min Park. Utilizing noise mapping for environmental impact assessment in a downtown redevelopment area of Seoul, Korea. Applied Acoustics. 2008; 69 (8):704-714.
Chicago/Turabian StyleShi-Won Lee; Seo Il Chang; Young-Min Park. 2008. "Utilizing noise mapping for environmental impact assessment in a downtown redevelopment area of Seoul, Korea." Applied Acoustics 69, no. 8: 704-714.
The steady state oscillations of a system incorporating a non-linear hysteretic damper are studied analytically by applying a perturbation technique. The hysteretic damper of the system subject to harmonic resonant force is modelled by combining a Maxwell's model and Kelvin–Voigt's model in series. The non-linearity is imposed by replacing a spring element by a cubic-non-linear spring. The response of the system is described by two coupled second order differential equations including a non-linear constitutive equation. Proper rescaling of the variables and parameters of the equations of motion leads to a set of weakly non-linear equations of motion to which the method of averaging is applied. The bifurcation analysis of the reduced four-dimensional amplitude- and phase-equations of motion shows typical non-linear behaviors including saddle-node and Hopf bifurcations and separate solution branch. By the stability analysis, the saddle-node and Hopf bifurcation sets are obtained in parameter spaces. The software package AUTO is used to numerically study the bifurcation sets and limit cycle solutions bifurcating from the Hopf bifurcation points. It is shown that the limit cycle responses of the averaged system exist over broad parameter ranges.
Seo Il Chang. Bifurcation analysis of a non-linear hysteretic oscillator under harmonic excitation. Journal of Sound and Vibration 2004, 276, 215 -225.
AMA StyleSeo Il Chang. Bifurcation analysis of a non-linear hysteretic oscillator under harmonic excitation. Journal of Sound and Vibration. 2004; 276 (1):215-225.
Chicago/Turabian StyleSeo Il Chang. 2004. "Bifurcation analysis of a non-linear hysteretic oscillator under harmonic excitation." Journal of Sound and Vibration 276, no. 1: 215-225.