都市域の環境騒音に関する研究 : 住居系地域における騒音発生源について

Abstract

This paper describes some results of field surveys to grasp the condition of noise exposure lebels in residential areas. The surveys were carried out in two school districts belongs to residential areas in Nagoya City. Items of these surveys are measurements of noise lebels, noise sources and the traffic density. Points depicted from these surveys can be summarized as follows. 1) The average value of noise lebels is about 50 dBA. 2) The following kinds of noise sources make a contribution to community noise; its magnitude in descending order, the general noise, traffic noise, and unspecific noise. The percentage of contributions is almost 95 percent for these three kinds of noise sources. 3) Avarage values of noise lebels differ about 3dBA between two districts, and also there exists some difference for the rate of contributions of noise sources.