Mathematical Analysis of Noise in multi-plant Industries of tyre and the need to reduce Noise

Industrial noise is often a term used in relation to environmental health and safety, rather than nuisance, as sustained exposure can cause permanent hearing damage.The problem of noise in the three industries around Tehran has been examined in this study; and noise measurement and survey studies have been carried out at three construction sites of tyre industry. Sound level meter equipment has been used to measure noise in the sites and when the machines are on, noise measured. It has been specified, during the surveys, that the noise levels detected in all the industries are much above the standard levels that is specified in the EPA standards. For reducing industrial noise in the sites, some methods suggested. Noise also acts synergistically with other hazards to increase the risk of harm to workers. In particular, noise and dangerous substances (e.g. some solvents) that have some tendencies towards ototoxicity may give rise to rapid ear damage