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Research code: A-10-901-2
Ethics code: A-10-901-2

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1- Iran University (
2- Tehran University
3- Shahid Beheshti University ,
Abstract:   (262 Views)
Objective: People are constantly hearing different sounds that can influence them in their work and living place. The present study was conducted with the aim of investigating the effect of traffic noise on cortisol and salivary alpha-amylase biomarkers.
Methods: The subjects were young men in the age range of 18 to 35 years old, who performed driving activities in the laboratory for one hour. The experiments were performed in two conditions of background noise (35 dBA) and traffic noise with a level of 75 dBA and saliva samples were collected from the subjects before and after driving. Finally, saliva samples were analyzed by cortisol and alpha-amylase kits and by ELISA method. The statistical method used for data analysis was SPSS software version 24 and data analysis was performed by Wilcoxon statistical test.
The results of this study showed that the concentrations of both biomarkers cortisol and alpha-amylase in background noise conditions after driving were higher than before the start, although this increase was not significant (p-value> 0.05). In the presence of traffic noise with a level of 75 dBA, the concentration of both biomarkers after driving was significantly higher than before driving. (p-value <0.05)
Conclusion: This study showed that exposure to traffic noise while driving can increase the concentration of salivary alpha-amylase and cortisol biomarkers.
Article number: 1
Type of Study: Research Article | Subject: Physical agents

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