Immittance audiometry assesses middle ear function objectively by measuring how much sound is being absorbed by the eardrum and ossicular chain in response to air pressure changes. It also allows us to evaluate Eustachian tube function. Measuring the reflexes of the middle ear muscles provides valuable information about how the auditory system and neural pathways react to high intensity sounds, allowing the identification of neural problems that may occur beyond the inner ear.
Otoacoustic Emissions (OAE) is another objective test that evaluates inner ear (cochlear) function. The outer hair cells of the cochlea help to tune and sharpen incoming sounds. The responses of these cochlear hair cells to specially selected stimuli can be recorded. This information allows us to determine the health of these delicate structures and how they impact auditory function.