EMISSÕES OTOACÚSTICAS EVOCADAS POR PRODUTO DE DISTORÇÃO EM TRABALHADORES NORMO-OUVINTES EXPOSTOS AO RUÍDO OCUPACIONAL DISTORTION PRODUCT OTOACOUSTIC EMISSIONS IN NORMAL-HEARING WORKERS EXPOSED TO OCCUPATIONAL NOISE EMISIONES OTOACÚSTICAS POR PRODUCTOS DE DISTORSIÓN EN LOS TRABAJADORES CON AUDICIÓN NORMAL EXPUESTOS AL RUIDO OCUPACIONAL

Introduction The otoacoustic emissions test has been highlighted by the possibility of detecting early cochlear changes resulting from exposure to noise, not identified by audiometry. Objective: To evaluate the distortion product otoacoustic emissions in normal-hearing workers exposed to occupational noise. Method: This was a cross-sectional study in steel mills of the Federal District, in which it was evaluated by means of product otoacoustic emissions Distortion, workers of both sexes, aged between 18 and 35 years, thresholds audibility at or below 25 dB HL without hearing impairment. Results: We found significant changes in otoacoustic emissions in both ears. In the amplitude and signal/noise ratio was observed that the higher the frequency the lower the averages found in otoacoustic emissions. How often is the worst records of 6 KHz. Conclusion: The otoacoustic emissions distortion product in normal-hearing workers reveal cochlear changes could detect the appearance of the lesion in outer hair cells.