en Occupational Health Review Article <div style="text-align: justify;"><span style="font-size:10pt"><span style="line-height:150%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Background:</span></span></span></b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> Occupational noise-induced hearing loss (ONIHL) represents a significant health concern for workers across diverse industries in Iran. This systematic review aims to identify key contributing factors, including noise exposure levels, physical agents, and chemical hazards. </span></span></span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:150%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Materials and Methods:</span></span></span></b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> Methodologically, it&nbsp;is&nbsp;a systematic review of relevant articles from both English databases (PubMed, Scopus, ScienceDirect, Web of Science) and Persian sources (Medex, Magiran, SID), The search employed keywords such as &quot;noise,&quot; &quot;Iran,&quot; &quot;hearing loss,&quot; &quot;industry,&quot; &quot;occupation,&quot; and &quot;worker.&quot; Out of 79 initial articles, 30 were selected based on quality and relevance, all published between January 1, 2012, and December 31, 2023. </span></span></span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:150%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Results:</span></span></span></b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> The selected studies were analyzed in two main categories: industry-specific prevalence patterns and combined effects of noise with environmental co-exposures. The results indicated higher prevalence rates of hearing loss among workers in mining, rubber manufacturing, ceramics, automotive, metalworking, dentistry, transportation, and airport personnel. Exposure to noise levels above 85 dB (A), particularly when coupled with age, work experience, and inadequate use of protective equipment, significantly elevates the risk. Additional factors such as smoking, chemical solvents, and heavy metals exert synergistic effects which further exacerbate hearing loss. </span></span></span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:150%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Conclusions:</span></span></span></b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> This review highlights the critical importance of comprehensive noise assessments and industry-specific hearing conservation programs to prevent irreversible hearing loss among workers. Our findings emphasize an urgent need for strengthened occupational health regulations that address both noise exposure and synergistic effects of combined hazards.</span></span></span></span></span></span></span></div> Hearing Loss,Noise-Induced,Noise,Industry,Occupational,Iran, 161 178 http://johe.rums.ac.ir/browse.php?a_code=A-10-53-7&slc_lang=en&sid=1 Akbar Ahmadi Asour asour50@yahoo.com 22400319475328460014169 22400319475328460014169 No Assistant Prof, Dept. of Health, Safety & Environment, Faculty of Health, Sabzevar University of Medical Sciences, Sabzevar, Iran. Sabzevar University of Medical Sciences Fatemeh Musavi musavi66@gmail.com 22400319475328460014170 22400319475328460014170 No Ph.D. Student, Dept. of Ergonomics, Faculty of Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Shahid Beheshti University of Medical Sciences, Majid Fallahi mjfllh@yahoo.com 22400319475328460014171 22400319475328460014171 Yes Asscociated Prof, Dept. of Occupational Health and Safety Engineering, Faculty of Health, Sabzevar University of Medical Sciences, Sabzevar, Iran. Sabzevar University of Medical Sciences