Evaluation of noise-induced hearing loss with audiometer and distortion product otoacoustic emissions.

Objective: To compare the results of audiogram and distortion product otoacoustic emissions (DPOAEs) parameters between staffs working in a noisy environment and normal subjects.

Material And Method: Hearing function of 32 noise-exposed workers and 18 reference subjects were assessed with DPOAEs and pure-tone audiometry. Results were compared among three groups: 1) ears of reference subjects, 2) audiometrically normal ears of noise-exposed subjects, and 3) audiometrically abnormal ears of noise-exposed subjects.