International Journal of Preventive Medicine (Int J Prev Med)2008-78021332022041026302630ENDepartment of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences, IsfahanÉcole d’orthophonie et d’audiologie, Faculty of Medicine, Université de Montréal, Montreal, QuebecDepartment of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences, IsfahanDepartment of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan & Department of Mechanical Engineering, Sogang University, SeoulDepartment of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan20220409Dear Editor, This study was conducted due to the prevalence increase of hearing loss in Iran industries, despite the outspread in hearing protection programs. There was also a report from Canada, Oct 8, 2018 on Hearing Disorders, according to a recent study from Work Safe BC, The National Safety Council’s Safety Health Magazine. Researchers looked at hearing test data collected by oil and gas employers from 2012 to 2017. They found that, despite an increase in workers reporting they wear hearing protection (to 98% from 94%), the percentage of workers with noise‑induced hearing loss grew to 45 from 33. Of the 294 workers affected, 66% were younger than 35.http://ijpm.mui.ac.ir/index.php/ijpm/article/view/2630http://ijpm.mui.ac.ir/index.php/ijpm/article/download/2630/717718471