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OAEs are tiny sounds generated by movement of outer hair cells of a normal inner ear following the presentation of an auditory stimulus. These sounds are recordable using a probe in the ear canal. OAEs are absent when there is a mild or greater sensorineural hearing loss (more than 30dB), and absent when there is middle ear fluid. Because OAEs measure the function of the cochlea, while ABRs measure the function of auditory nerve pathways, OAEs and ABRs can be used together to determine whether a hearing loss is sensory (cochlear) vs. neural in origin.
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Otoacoustic Emissions
