The effects of contralateral noise exposure on evoked otoacoustic emission (e-OAE) was investigated in 10 normal hearing subjects and 3 cases with unilateral deafness. The e-OAE was recorded by ILO88 and weighting noise was given to the contralateral ear. The e-OAE power decreased along with the increased noise intensity given by the air conduction in all normal hearing subjects. But no effect was found in unilateral deafness. The mean decrease of e-OAE power was 2.1dB. The bone conduction noise exposure showed no effects on e-OAE power in either normal hearing subjects or unilateral deafness. Based upon these results, it was suggested that the effects of contralateral noise exposure on the function of cochlear micromechanics was minimal, which could be probably via crossed olivocochlear bundle.
