ERO-SCAN - Otoacoustic Emission Testing - Brochure

Otoacoustic Emissions: Evoked Otoacoustic Emissions (OAEs) are soft sounds returned by the inner ear as a response to a sound event. The inner ear contains hair cells, which are responsible for transforming the sound signal to a nerve potential, that is processed in the brain. These hair cells respond to sound by vibrating. The vibration produces a very quiet sound, that echoes through the middle ear to the ear canal. With very sensitive microphones, this sound can be measured. TEOAEs are evoked by a transient stimulus, DPOAEs are evoked by a pair of pure tone stimuli.