Resource Documents: Iran (2 items)
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Impact of wind turbine sound on general health, sleep disturbance and annoyance of workers: a pilot-study in Manjil wind farm, Iran
Author: Abbasi, Milad; Monazzam, Mohammad Reza; Akbarzadeh, Arash; Zakerian, Seyyed Abbolfazl; and Ebrahimi, Mohammad Hossein
Background: The wind turbine’s sound seems to have a proportional effect on health of people living near to wind farms. This study aimed to investigate the effect of noise emitted from wind turbines on general health, sleep and annoyance among workers of manjil wind farm, Iran.
Materials and methods: A total number of 53 workers took part in this study. Based on the type of job, they were categorized into three groups of maintenance, security and office staff. The persons’ exposure at each job-related group was measured by eight-hour equivalent sound level (LAeq, 8 h). A Noise annoyance scale, Epworth sleepiness scale and 28-item general health questionnaire was used for gathering data from workers. The data were analyzed through Multivariate Analysis of variance (MANOVA) test, Pillai’s Trace test, Paired comparisons analysis and Multivariate regression test were used in the R software.
Results and discussion: The results showed that, response variables (annoyance, sleep disturbance and health) were significantly different between job groups. The results also indicated that sleep disturbance as well as noise exposure had a significant effect on general health. Noise annoyance and distance from wind turbines could significantly explain about 44.5 and 34.2 % of the variance in sleep disturbance and worker’s general health, respectively. General health was significantly different in different age groups while age had no significant impact on sleep disturbance. The results were reverse for distance because it had no significant impact on health, but sleep disturbance was significantly affected.
Conclusions: We came to this conclusion that wind turbines noise can directly impact on annoyance, sleep and health. This type of energy generation can have potential health risks for wind farm workers. However, further research is needed to confirm the results of this study.
Mohammad Reza Monnazzam
Seyyed Abolfazl Zakerian
Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of
Medical Sciences, Tehran, Iran
Mohammad Hossein Ebrahimi
Department of Occupational Health Engineering, School of Public Health, Shahroud University of Medical
Sciences, Shahroud, Iran
Journal of Environmental Health Science & Engineering (2015) 13:71
DOI: DOI: 10.1186/s40201-015-0225-8
Effect of Wind Turbine Noise on Workers’ Sleep Disorder: A Case Study of Manjil Wind Farm in Northern Iran
Author: Abbasi, Milad; Monazzam, Mohammad Reza; Zakerian, Sayed Abbolfazl; and Yousefzadeh, Arsalan
[Abstract] Noise from wind turbines is one of the most important factors affecting the health, welfare, and human sleep. This research was carried out to study the effect of wind turbine noise on workers’ sleep disorder. For this, Manjil Wind Farm, because of the greater number of staff and turbines than other wind farms in Iran, was chosen as case study. A total number of 53 participants took part in this survey. They were classified into three groups of mechanics, security, and official. In this study, daytime sleepiness data of workers were gathered using Epworth Sleepiness Scales (ESS) was used to determine the level of daytime sleepiness among the workers. The 8-h equivalent sound level (LAeq,8h) was measured to determine the individuals’ exposure at each occupational group. Finally, the effect of sound, age, and workers’ experience on individuals’ sleep disorder was analyzed through multiple regression analysis in the R software. The results showed that there was a positive and significant relationship between age, workers’ experience, equivalent sound level, and the level of sleep disorder. When age is constant, sleep disorder will increase by 26% as per each 1 dB increase in equivalent sound level. In situations where equivalent sound level is constant, an increase of 17% in sleep disorder is occurred as per each year of work experience. Because of the difference in sound exposure in different occupational groups. The effect of noise in repairing group was about 6.5 times of official group and also 3.4 times of the security group. Sleep disorder effect caused by wind turbine noise in the security group is almost two times more than the official group. Unlike most studies on wind turbine noise that address the sleep disorder among inhabitants nearby wind farms, this study, for the first time in the world, examines the impact of wind turbine noise on sleep disorder of workers who are more closer to wind turbines and exposed to higher levels of noise. So despite all the good benefits of wind turbines, it can be stated that this technology has health risks for all those exposed to its sound. However, further research is needed to confirm the results of this study.
Milad Abbasi, PostGraduate Student, School of Public Health
Mohammad Reza Monnazzam, Occupational Hygiene Department, School of Public Health, and Center for Air Pollution Research, Institute for Environmental Research (IER)
Sayed Abbolfazl Zakerian, Assistant Professor, School of Public Health
Arsalan Yousefzadeh, PostGraduate Student, School of Public Health
Tehran University of Medical Sciences, Tehran, Iran
Fluctuation and Noise Letters 14, 1550020 (2015) [15 pages]
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