CSD-2260 Lecture Notes - Lecture 23: Otitis Media, Basilar Membrane, Muscle Spindle
1 Dec 2016
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Document Summary
Match the impedance of two conductive systems. Area ratio provides a 25 db gain. Level advantage provides a 2 db gain. Buckling effect provides a 4-6 db gain. These three impedance matching devices combined cause a signal gain of around 31 db. Disorders that impede middle ear function reduce audition. Inner ear function: performs frequency and temporal acoustic analysis of incoming acoustical signal, components of inner ear function. Vestibular mechanism: provide major input to proprioceptive system. Responsi(cid:271)le for the sense of one"s (cid:271)ody in spa(cid:272)e. Auditory mechanism: mechanical events: the cochlea. Most awe-inspiring sensory system of the body. Establishes first level of auditory processing of incoming acoustic signals. Identifies temporal aspects of signal: the traveling wave. Arises from stimulation of perilymph of vestibule. Moves along basilar membrane until it reaches point of maximum growth. Wave damps after reaching maximum growth: basilar membrane. Thicker, stiffer, and wider at base than at apex.
