Background: Exposure to noise could be caused many unhealthy conditions. If noise was in suitable limit, it was not been harm. Objective of this study was to determine the health effects of noise on workers’ health. Methods: It was a study. The articles with people who were employed in different industries were participated in this study. Articles groups were followed for sleep disorders, psychological, neurological and cardiovascular symptoms and signs. These groups were exposed to different levels of noise; according to work site, 4 groups were participated: work site 1, work site 2, work site 3 and work site 4. Symptoms and signs were determined. Data were analyzed with SPSS 16. ANOVA, Chi-2, Exact test and relative risks with considering P<0.05 as significant level. Results: In articles Work site 4, had the most noise levels; 79.05±0.10 dB A. Sleep disorders, psychological, neurological and cardiovascular symptoms and signs. Were determined. All of the symptoms and signs were the most in group 4. Relative risks for confusion was 1.88(1.20-2.95), for loss of concentration was 1.72(1.17-2.53), for fatigue was 1.71(1.02-3.57). Risks for headache and sleep disorders in group 4 were 1.70(1.01-3.56) and 1.61(1.03-3.77). Conclusions: Noise had health effects in low to moderate levels and might be caused confusion, loss of concentration, fatigue, headache and sleep disorders.