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Showing 2 results for Noise Pollution
Asiyeh Moteallemi , Bijan Bina, Soheila Mortezaie,
Volume 5, Issue 1 (1-2018)
Abstract
Background: Noise pollution is one of the most important environmental pollutions that affects human health in different dimensions. The current study aimed to survey the effects of noise pollution on residents of the Samen district in Mashhad.
Methods: To understand the psychological effects that noise pollution caused by vehicles has on people, 400 questionnaires designed to gather demographic data and information on attitudes about noise pollution, its effects on people’s activities, and noise source annoyance were randomly distributed among the people living in the Samen district of Mashhad city. SPSS software was used for statistical analysis.
Results: According to the results of this study, the most important effects noise pollution had on the studied society were nervousness (29.1%), conversation problems (19.8%), amnesia (18.3%), and loss of concentration (12.8%). Furthermore, 54.8% of the respondents considered the environmental noises annoying, and 32.5% reported it very annoying. In this study, traffic noise was reported as the most important source of noise pollution.
Conclusion: Generally, the results showed that noise pollution is a serious issue in the Samen district, and the necessary actions should be taken to control noise and prevent the effects of noise pollution.
Hadi Negahdari, Sirus Javadpour, Faramarz Moattar, Hashem Negahdari,
Volume 5, Issue 4 (12-2018)
Abstract
Background: Today, the effects of environmental pollution on human life and human needs, which reduces the level of community health caused by traffic noise in large cities, are clearly visible by creating irritation and pathogenic conditions. The aim of this study was to assess the risk of noise pollution
resulted from central traffic in Shiraz by analyzing its indicators and related components.
Methods: By specifying the high traffic jam in Shiraz, the sound and its frequency in 156 points of the city were analyzed using a sound analyzer (Tes-1358C model). The sound pressure levels (LA and LP) and the one and one-third octave band were continuously measured in A and C networks. Then, data were extracted and analyzed using Excel 2016 and Minitab 18.1. Eventually, phon and sone indexes were calculated for the heavy traffic jam in some of the central streets of Shiraz and the results were statistically calculated and their charts were prepared with comfort disturbance ranges.
Results: The highest harmful frequency of traffic in Shiraz was 50 Hz and 83.3 dB. The sound pressure level ranged from 70 to 92.7 dB in network A and 87.8 dB in network C. The maximum sound level was 87 phon and the maximum sone was 26 at 14 stations.
Conclusion: According to the results, the sound pressure levels exceeded the environmental standards of Iran and the values of phon and sone were higher than the standard of comfort at night and day.
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