effect of contralateral white noise on transient evoked otoacoustic emissions in different age groups

ABSTRACT

Transient evoked otoacoustic emissions [TEOAEs] can be suppressed by simultaneous contralateral sound stimulation, this suppression is mediated by the normal olivocochlear bundle. The aim of this study is to propose normative data for different age groups and gender. TEOAEs were recorded with and without contralateral white noise [WN]. The results revealed that 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. The study concluded that TEOAEs recording during contralateral acoustic stimulation provide rapid, noninvasive and objective means of investigating the medial olivocochlear efferent fibers in humans