Background: Transient evoked otoacoustic emissions (TEOAEs) can be suppressed by simultaneous contralateral sound stimulation, this suppression is mediated by normal olivocochlear bundle. Objective: the aim of this study is to propose normative data for different age groups and genders. Methods: TEOAEs were recorded without and with contralateral white noise (WN). Results: TEOAE echo response decreased with age. Contralateral WN suppressed emission amplitude and the amount of suppression decreased significantly with increased age with a significant negative correlation between the amount of TEOAE suppression and age. Conclusions: TEOAEs recording during contralateral acoustic stimulation provide rapid, non-invasive and objective means of investigating the medial olivocochlear efferent fibers in humans.