C_S_D 4430 Lecture Notes - Lecture 33: Basilar Membrane, Cochlea, Micromechanics
Document Summary
Sound waves are created when air particles move back and forth in space creating alternating pressure changes. The number of alternating pressure changes that occur in one second. Hertz (hz): the unit of measure for frequency (cycles/second) Frequency is associated with our perception of pitch (higher frequency = higher pitch) Intensify is associated without perception of loudness (higher intensity = greater loudness) Outer ear, middle ear, inner ear, auditory nerve. The cochlea is a fluid-filled system encased in bone. Fluid surrounds and fills the membranous portion of the cochlea. The organ of the corti, the sense organ of hearing, sits on top of the basilar membrane. The organ of corti contains both inner and outer hair cells, the receptor cells of the auditory system. The tectorial membrane rests on top of the organ or corti. Stiffest at its base and grows progressively less stiff as it extends apically.
