PHYS 215 Lecture Notes - Lecture 11: Ear Canal, Basilar Membrane, Oval Window
21 Sep 2016
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Document Summary
External, middle, and inner ear: external and middle ear. Transmit sound waves to the fluid-filled inner ears: inner ear the cochlea. Receptors that convert sound waves into nerve impulse: vestibular apparatus of the inner ear. Sense of equilibrium: each inner ear region has mechanoreceptors. Vibration is then picked up by the incus which transmits the vibration to the stapes: stapes moves back and forth and pushes the oval window in and out. Sound waves: consist of alternating regions of compression and refraction of air molecules, pitch. Depends on the frequency of air waves. Region of the basilar membrane that vibrates: loudness. Depends on the amplitude of air waves: timbre. Hair cells auditory receptors located in the organ of corti. Inner hair cells lie between the modiolus and rods of corti. Outer hair cells cells beyond the rods of corti possessing. ~ 100 stereocillia arrange in a v, 3 rows.
