چکیده:
Noise pollution in cities is one of the important environmental issues which
causes harmful effects such as hearing loss, sleep disorder, hypertension and
gastrointestinal complaints in people of cities. To prevent these effects and
access to recommended standards, measuring noise pollution in cities is
necessary. This study aims to identify amount of noise pollution in
geographical arena of Khalkhal Town. Using sound maps, in 22 stations
with regular 500 m distances in systematic random sampling, measuring
were done in time slots of morning and evening in winter 2014 and summer
2015 through 450 cell hydrophone. Results indicated that noise pollution in
Khalkhal Town is higher than standard in day according to Iran’s
Environment Standard in days (50 db) with average of 52/4313 db. Also,
results of t-test at night (Iran’s Environment Standard = 45 db) indicated
that average of noise pollution in Khalkhal City (48/8370 db) is higher than
standard limit.
خلاصه ماشینی:
"Investigation of Noise Pollution in Khalkhal Town in winter and Summer Using Analysis of Statistical Data Seyyedeh Narges Karimpour*, Leila Rostami Bairagh and Saba Hajjabbari Department of Environmental science, Ardabil Branch, Islamic Azad University, Ardabil, Iran Original Article: Received 05 May. 2016 Accepted 15 May. 2016 Published 17 June.
Results indicated that noise pollution in Khalkhal Town is higher than standard in day according to Iran’s Environment Standard in days (50 db) with average of 52/4313 db.
Also, results of t-test at night (Iran’s Environment Standard = 45 db) indicated that average of noise pollution in Khalkhal City (48/8370 db) is higher than standard limit.
Keyword: Noise pollution, Khalkhal Town, Statistical data * Corresponding author: Seyyedeh Narges Karimpour Peer review under responsibility of UCT Journal of Research in Science, Engineering and Technology INTRODUCTION Men live in an environment which bothersome inferno get more and more every day.
This study aims to investigate noise pollution amount in Khalkhal Town in winter and summer using analysis of statistical data.
T-test for noise pollution at days with Iran’s Environment Standard One-Sample Statistics N Mean Std. Deviation Std. Error Mean VAR00001 23 52.
T-test for noise pollution at nights with Iran’s Environment Standard One-Sample Statistics N Mean Std. Deviation Std. Error Mean VAR00002 23 48.
Results of the research indicated that noise pollution in Khalkhal City according to Iran’s Environment Standard at days (50 db) with average of 52.
Also, results of t-test at nights (Iran’s Environment Standard = 45 db) show that average of noise pollution at Khalkhal City (48."