Another diagnostic test Dr. Light performs is evoked otoacoustic emissions (OAE). This checks how the sensory receptors of the inner ear are working. The sensory receptors of the ears are known as the outer and inner hair cells which can be found inside the cochlea. The inner ear is comprised of both the vestibular system and the cochlea. The responsibility of the hair cells is to transform sound waves and its vibrations into a neural signal that is passed along to the auditory nerve and carried up to the brain.Evoked otoacoustic emissions testing takes approximately two minutes to complete. It is part of all evaluations done at Brainchild Institute.