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Comparison between old and new noise standards in Nagoya City
Authors:Atsushi Asai  Yoshiaki Mishina  Toshimitsu Ogura  Masaaki Omiya
Institution:a Daido Institute of Technology, Nagoya 457-8530, Japan
b Gifu Prefectural Office, Gifu 500-8570, Japan
c Suzuka University of Medical Science, Suzuka, Mie 510-0293, Japan
d Nagoya City Environmental Science Research Institute, Nagoya 457-0841, Japan
e Mie University, Mie 514-8507, Japan
Abstract:The Japanese Environmental Agency (now the Ministry of the Environment) updated the environmental quality standards for noise in April 1999. The new standards replaced the median value of percentile level L50 for noise evaluation with the equivalent sound pressure level LAeq. The standards renewed the classification of areas and time sections. The most significant change was the introduction of category of artery-road-adjacent area.This report sets the range of the artery-road-adjacent area to 20 m or less from the applicable road to compare the new standards with the old, based on data collected in Nagoya City. The achieved rates for the new standards seem to be on the whole the same as those for the old standards. However, a detailed analysis reveals some differences, such as higher achieved rates in the artery-road-adjacent areas and lower achieved rates in the general areas for the new standards than for the old.
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