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Published byLoraine Merritt Modified over 8 years ago
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The steps of hearing
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The auricle directs sounds into the external auditory meatus This guides the sound towards the ear drum
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The eardrum vibrates in response to the sound Quiet sounds produce few vibrations which makes the sound quiet Loud sounds produce more vibrations which makes the sound appear louder and stronger
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Malleus picks up the vibration and passes it along to the incus and then to the stapes Stapes pushes on the oval window which vibrates Oval window intensifies the sound further (due to increased vibrations) which ensures that the waves do not lose any intensity as they travel to the cochlea
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In response to the vibrations by the oval window, the perilymph in the cochlea begins to move Speed of movement is related to the rate of vibrations
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These waves will move the round window The waves will also begin to create a rise in pressure in the cochlea
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Endolymph will move in response to the waves This causes the basilar membrane to vibrate Vibration of this membrane will lead to movement of the hairs in the organ of Corti
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Hairs in the Organ of Corti bend The bending initiates action potentials in all attahched neurons These action potentials will ultimately lead to the perception of sound
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All impulses travel along the cochlear nerve to the brain for processing Any damage to this nerve leads to deafness Implants can be used to restore hearing in individuals who experience this type of deafness
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