Study of noise pollution in the district 5 of Tehran municipally

The purpose of this study is the amount of sound pollution in the region 5 of Tehran. This area because the population density, residential neighborhood with various highway, too many traffic and transportation are important for attention. This study was done in mordad and tir mounts in 1390 that in 61 stations on three state in peak hour traffic that sounds parameters were measured then getting into GIS software of data geograpic and layers of information to provide amount of pollution in the region, was determine disruption of sound pollution, critical point and the regions whithout sound pollution. In this study used 260 questionnaire. The average of Equivalent Noise level (Leq) in the the region 5 of Tehran was 72.3 dB(A) that maximum valu of Leq have been registered in station bridge to the air industry in amount of 80.7 dB(A) and the least amount registered in the station kohsar park in amount of 55.9dB(A) also maximum amount of the indexes sounds (L90, L10) Traffic Noise Index (TNI) and Level of Noise Pollution (LNP) each respective values 90 dB(A), daneshgahe elmi va carbordi station, 80.3 dB(A) Tehran- karaj highway station and 106.2dB(A) station of ferdos- aghil and 92.2 dB(A) in thedaneshgahe elmi va karbordi station respectively. As the results show in all of the stations of measurement of noise, Equivalent NoiseLevel was measured more than the day standard level of Iran.