0-25db
no loss
26-40db
mild
41-55db
moderate
56-70db
moderate to severe
71-90db
severe
91+ db
profound
outer ear parts
pinne, lobule, external auditory canal, concha
Middle ear parts
tympanic membrane (eardrum), ossicular chain, eustachian tube
Inner ear parts
cochlea, cochlear nerve, vestibular system