Exs_3.6 - Ears: Cochlea and Hearing Exercise 3.6 Conduction...

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Ears: Cochlea and Hearing Exercise 3.6
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Conduction of Sound through Ears Sound waves conducted through outer ear (pinna and external auditory medius) → tympanic membrane (eardrum) → causes vibrations → causes vibrations of 3 ossicles of middle ear (malleus, incus, stapes) → footplate of stapes pushes against oval window → produces waves in fluid-filled cochlea of inner ear → causes vibrations of the basilar membrane and displacement upward of sensory hair cells within membrane into tectorial membrane → stimulates a train of action potentials along the vestibulocochlear nerve to the brain The action potentials are interpreted as the sound of a specific pitch and a specific loudness Pitch: determined by location of stimulated hair cells Loudness: determined by frequency of action potentials
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Figure 10.18
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Figure 10.19
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Conduction of Sound Waves through Bone Fluid of cochlea can also be made to vibrate in response to sound waves conducted through the skull bones
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Exs_3.6 - Ears: Cochlea and Hearing Exercise 3.6 Conduction...

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