Hearing and Deafness Anatomy & physiology. Protection Impedance match Capture; Amplify mid-freqs Vertical direction coding Frequency analysis Transduction.

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Presentation transcript:

Hearing and Deafness Anatomy & physiology

Protection Impedance match Capture; Amplify mid-freqs Vertical direction coding Frequency analysis Transduction Outer, middle & inner ear

Conductive hearing loss Sounds don’t get into cochlea Middle ear problems Helped by surgery and by amplification

Cochlea

Cochlea cross-section

Organ of Corti

Hair Cell Stereocilia

Auditory nerve innervation OHC (2) spiral afferent (green) medial efferent (red) IHC (1) radial afferent (blue) lateral efferent (pink)

Inner vs Outer Hair Cells are Physiologically Different

Travelling wave on basilar membrane sorts sounds by frequency

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