Abstract
Objectives: To investigate the effect of acoustic reflex decay sounds on the amplitude of distortion product otoacoustic emission in adults with normal hearing threshold level. Conclusion: There is a strong correlation between high continuous intensity sound and the reduction in the distortion product otoacoustic emission amplitude. The function of the outer hair cells (OHCs) is impaired after exposure to high intensity. Distortion product otoacoustic emissions (DPOAEs) are useful in examination of noise-induced level shifts, reflex decay high intensity sounds may result in temporary reduction in the distortion product otoacoustic emission strength. Further investigation to be carried out on a group of hearing impaired patients to quantify the effect of the acoustic reflex decay on the distortion product otoacoustic emission amplitude whether its the OAE amplitude reduction is temporary or permanent.
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