The results of the clinical assessment and audiometery test in the industeries of the Shisheh Hamadan , Khosh Nosh , Keyvan , Nasimavar and industeries factories of the Malayear and the mining of the lead fiund aut that average of the hearing loss in total subjects is 32.42 db with SD 24.72 db in addition to  , The results of audiometery from Hamadan Khosh Nosh factory indicated that 13.4% were developed to deep hearing loss or occuptional deafness (over 91 db), whereas in the workers of Malayear alrangeran lead mining is 12.5% miniotry of subjects  from Hamadan Nasimavar factory  (12.2%) were developed to mild hearing loss and total of subjects were developed to tympanic rupture.