Diagram ear canal

The Outer Ear. Sound energy spreads out from its sources. For a point source of sound, it spreads out according to the inverse square law.For a given sound intensity, a larger ear captures more of

the wave and hence more sound energy. The outer ear structures act as part of the ear's preamplifier to enhance the sensitivity of hearing. The auditory canal acts as a closed tube resonator The ear canal (external acoustic meatus, external auditory meatus, EAM; Latin: meatus acusticus externus) is a tube running from the outer ear to the middle ear.The adult human ear canal extends from the pinna to the eardrum and is about 2.5 centimetres (1 … Sound is collected by the pinna (the visible part of the ear) and directed through the outer ear canal.

The sound makes the eardrum vibrate, which in turn causes a series of three tiny bones (the hammer, the anvil, and the stirrup) in the middle ear to vibrate. The ears contain structures for both the sense of hearing and the sense of balance. The eighth cranial nerve (vestibulocochlear nerve made up of the auditory and vestibular nerves) carries nerve impulses for both hearing and balance from the ear to the brain. Hearing: The eardrum vibrates when sound waves enter the ear canal.Ossicles, three tiny bones (including the stapes, the smallest bone in the body), pass vibrations to the oval window,

which is a Continued From Above Outer Ear. The outer ear consists of the exterior structures of the ear, the auricle and external auditory canal. Visible on the exterior of the head is the auricle, the external part of the ear that extends from the head. Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. Structure. The diagram shows the shape and location of most of

these components: '[antihelix]]) forms a 'Y' shape where the upper parts are: Superior crus (to the left of the fossa triangularis in the diagram); Inferior crus (to the right of the fossa triangularis in the diagram); Antitragus is below the tragus; Aperture is the entrance to the ear canal; Auricular sulcus is the depression An infection of the ear canal (the outer ear) is sometimes referred

to as swimmer's ear. The name comes from the fact that it most often occurs when the ear canal stays wet long enough for bacteria or other organisms to grow. The eustachian tube is a canal that connects the middle ear to the nasopharynx, which consists of the upper throat and the back of the nasal cavity. It controls the pressure within the middle ear

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