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How Sound Travels Through the Ear (1. External Ear (Auricle A funnel like…
How
Sound
Travels
Through
the
Ear
1.
External Ear
Auricle
A funnel like structure that collects sound waves that are traveling through the air and channels them through the ear canal
External Acoustic Meatus
Also known as the ear canal. Once the sound reaches the external acoustic meatus, the sound is amplified. It then carries sound to the tympanic membrane.
Tympanic Membrane
Also known as the eardrum. It is a flexible, oval shaped membrane located at the end of the ear canal. It vibrates in response to the sound waves and it also reproduces vibrations of the sound waves.
2.
Middle Ear
Auditory Ossicles
The vibrations from the eardrum set the ossicles in motion. They are the 3 smallest bones in the human body.
Incus
The incus vibrates in response to the malleus.
Malleus
Vibrates in unison with the tympanic membrane.
Stapes
The incus passes movement to the stapes.
3.
Inner Ear
Oval Window
Where the sound waves enter.
Scala Vestibuli
Conducts sound vibrations to the cochlear duct.
Vestibular Membrane
Separates endolymph and perilymph which allows nutrients to cross through both fluids.
Cochlear Duct
Filled with endolymph and it houses the organ of corti.
Cochlear nerve
Sends nerve impulses to the auditory cortex of the brain for interpretation.
Basilar Membrane
Contains sensory hairs that allow you to hear sound when it travels through.
Scala Tympani
Allows vibrations to escape into the air of the tympanic cavity.
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