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Received : August 2011, Accepted : November 2011 Background: The sound is an environmental and occupational pollutant and can cause a number of reactions in human body, in which hearing loss is one of the most important effects. Cement industry is one of the industries with noise induced hazards. The aim of this study was to evaluate the noise level in different parts of Kerman Cement Plant. Materials and Methods: This descriptive cross-sectional study was done in Kerman Cement Plant in 2009. The sound level was measured according to the standard ISO 9612:1997 (E) in workers main commuting spots. Noise levels were measured by the testo SLM device (Model CEL-815) in network A and calibrator model IEC942/90 claa2. Data were analyzed by the EXCEL software. Results: The highest sound pressure level in the Cement Plant (106 db) was recorded in the stone crushing units and the grinding units (mills); 14 units had a mean sound level above the permissible 85 db noise level. Conclusion: There are specific units with high noise exposure in the Kerman Cement plant. Thus systematic noise evaluation in the working units, worker education, noise control, distributing proper standard noise protection equipment among the workers, performing annual audiometries, and evaluating and updating noise control programs are necessary.

Occupational noise exposure among the workers of Kerman Cement Plant, 2009