auditory canal

passage in the ear which sound passes through

The ear canal (external auditory meatus, external acoustic meatus), is a tube running from the outer ear to the middle ear. The ear canal extends from the pinna to the eardrum and is about 26 mm in length and 7 mm in diameter.
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Auditory canal n. Either of two passages of the ear, the internal or the external acoustic meatus. See under acoustic meatus. [more]Auditory canal - Community and Resources

Noun
1. either of the passages in the outer ear from the auricle to the tympanic membrane
(synonym) auditory meatus, acoustic meatus, ear canal, external auditory canal
(hypernym) meatus
(part-holonym) external ear, outer ear
(part-meronym) auriculare, auricular point

CANALE UDITIVO. MEATO ACUSTICO