Auditory System: Introduction

Sound: a tiny pressure wave

Pitch (Frequency): heard in Octaves

Pitch (Frequency): heard in Octaves

Complex sounds: Multiple frequencies

Loudness: Huge range; logarithmic

Timing: Used to locate sound sources

Auditory System: Demands

Auditory System: Ear

Middle Ear: Engineering; diseases

Inner ear: Cochlea

Basilar Membrane

Basilar Membrane: tonotopy, octaves

Basilar Membrane: tonotopy, octaves

Organ of Corti

Auditory System: Hair Cells

Auditory System: Hair Cells

Auditory System: Hair Cells

Hair Cells: Tricks to enhance response

Hair Cells: Tricks to enhance response

Ear:  a finely tuned machine

Cochlear prosthesis

Auditory Nerve (VIII cranial nerve)

Auditory Nerve (VIII): Receptive fields

Auditory Nerve (VIII): Receptive fields

Auditory System: Central Pathways

Auditory System: Central Pathways

Auditory System: Central Pathways

Cochlear Nucleus:

Auditory System: Central Pathways

Superior Olive: Locates sound sources

Superior Olive: locates sound sources

Auditory System: Midbrain

Auditory System: Midbrain

Auditory Cortex: Complex patterns

Auditory Cortex: Complex patterns

Auditory Cortex: “What vs. Where”

Auditory System: Speech Areas

Auditory System: Speech Areas

Auditory System: Cortical Plasticity

Auditory System: Recapitulation: