auricle - external portion of the ear, known as the pinna

2500 Hz - resonant frequency of the ear canal

cerumen - ear wax; functions to lubricate and please the canal, protect the ear

from fungi/bacteria/small insects

tympanic membrane - a membrane forming part of the organ of hearing, which

vibrates in response to sound waves.

ossicular chain (ossicles) - the three interconnected bones in the middle ear

that conduct vibration from the tympanic membrane to the cochlea

eustachian tube ...