Resonance ( gas vs liquid vs solid)

• Resonance ( gas vs liquid vs solid)

• Loss for energy in transfer of air to liquid (21X)

• Frequency coding via place on basilar mbr. Mapping nerve fibers

• Hair Cell Transduction (Inner HC compression by the tectorial membrane forcing ciliary bundle with cuticle into the apex of HC; this stretches the membrane around kinocilum base)

• Intensity (loudness coding)- # of afferent fibers on each HC (40); firing rate

• Direction detection- binaurial delay detection (MNTB)

• Efferent control for frequency discrimination (SO; Ach; outer HC lengthening lifts tectorial membrane)

• Alerting Reflex- Inferior Colliculus has spatial map for neck reflex turning for facing the source of the input.

• Cortical gating and synchronization- medial geniculate body

• Sound appreciation- Auditory Cortex- Superior Temporal Gyrus