NOISE POLLUTION AND TRAFFIC NOISE INDEX ON MASHHAD MAIN STREETS DURING THE BUSIEST HOURS OF SUMMER

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SAZGARNIA A.; BAHREYNI TOUSI SEYED MOHAMMAD HOSSEIN; MORADI HALEH

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Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF MEDICAL PHYSICS Year:2005 | Volume:2 | Issue:8 Page(s): 21-30

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Information Journal Paper

Title

NOISE POLLUTION AND TRAFFIC NOISE INDEX ON MASHHAD MAIN STREETS DURING THE BUSIEST HOURS OF SUMMER

Author(s)

SAZGARNIA A. | BAHREYNI TOUSI SEYED MOHAMMAD HOSSEIN | MORADI HALEH | Issue Writer Certificate

Keywords

NOISE POLLUTIONQ3

TRAFFIC NOISE INDEXQ4

LAEQQ4

NOISE POLLUTION INDEXQ4

MASHHADQ4

IRANQ4

Abstract

Introduction: Among the environmental pollutions, noise is very important for its physiological and psychological effects on human. Traffic noise is one of the most important pollutants and the hospitals are one of the critical places regarding this type of noise. For these reasons, in the summer of 1382, the traffic noise of MASHHAD main streets around the hospitals was assessed during the busiest hours.Materials and Methods: The noise indexes such as LAEQ, LAfmax, L10, L50 and L90 were measured by a Sound-Level-Meter, model Investigator 2260. The traffic load was also determined. On the basis of these results, NOISE POLLUTION Level (NPL) and TRAFFIC NOISE INDEX (TNI) were calculated. The assessment was done during three different periods of the days in twelve stations. Results: Based on the obtained results, the maximum LAEQwas recorded on Bahar Street during the morning hours and on Koohsangi Street during the morning and night periods. Throughout the three periods the maximum NPL and TNI were estimated on Bahar and Nakhrisi Streets, respectively. The correlation between all of the indexes was analyzed and a logarithmic correlation was observed between LAEQ and the traffic load.Discussion and Conclusion: On the basis of the noise standard in free field in IRAN, NOISE POLLUTION is a serious problem in MASHHAD.

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