Chronic industrial N.I.H.L. T.S.H. and cortisol levels

43 male from El-Delta Co for steel and Iron manufacture were investigated for pure tone hearing threshold and serum level of TSH and cortisol hormones. 32 of them were exposed to high intensity manufacture noise for many years, [first group] and the others were not exposed to the same risk, and considered as a control group] There was a marked difference in Hearing threshold between both groups, but there was no significant changes between TSH and cortisol level of both groups