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The outer ear, external ear, or auris externa is the external part of the ear, which consists of the auricle (also pinna) and the ear canal. [1] It gathers sound energy and focuses it on the eardrum ( tympanic membrane ).
English: A diagram of the anatomy of the human ear. Green is outer ear. ... external auditory canal auricle ≅ auricle (Q379858) auricle. Captions. English.
These portions of the ear are supplied by the cervical plexus and a small portion by the facial nerve. This explains why vesicles are classically seen on the auricle in herpes infections of the facial nerve (Ramsay Hunt syndrome type II). [1] The auricle's functions are to collect sound and transform it into directional and other information.
The outer ear is the external portion of the ear and includes the fleshy visible auricle, the ear canal, and the outer layer of the eardrum (also called the tympanic membrane). [2] [3] The auricle consists of the curving outer rim called the helix, the inner curved rim called the antihelix, and opens into the ear canal.
Macrotia refers to an ear that is larger than would be expected. [1] The normal auricular axis length is 58–62 mm (2.3–2.4 in) among females and 62–66 mm (2.4–2.6 in) among males. [ 2 ] The average width of an adult ear, specifically the distance between the helix root (inner front edge) and the posterior auricle (outer front edge), is ...
The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear.The adult human ear canal extends from the auricle to the eardrum and is about 2.5 centimetres (1 in) in length and 0.7 centimetres (0.3 in) in diameter.
External ear. Right auricle. Lateral view. ... This article incorporates text in the public domain from page 1033 of the 20th edition of Gray's Anatomy (1918)
The outer ear funnels sound vibrations to the eardrum, increasing the sound pressure in the middle frequency range. The middle-ear ossicles further amplify the vibration pressure roughly 20 times. The base of the stapes couples vibrations into the cochlea via the oval window , which vibrates the perilymph liquid (present throughout the inner ...