Hearing Physiology Perry C. Hanavan, AuD.

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Presentation transcript:

Hearing Physiology Perry C. Hanavan, AuD

Selective Enhancements: Outer Ear

Middle Ear Impedance Mismatch AREA RATIO Area of the tympanic membrane much larger than round window (25 dB) LEVER RATIO Length of long arm of malleus much longer than long arm of incus (2 dB) BUCKLING ACTION Force transmitted from center of tympanic membrane (i.e., TM doesn't move as plate) (4-6 dB)

OHC Vs. IHC

Traveling Wave

Human Tonotopic Organization

Narrow Tuning of Auditory Neuron

Dual Stream Model of Auditory Processing (Hickock and Poeppel)

Physiology of Hearing?

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