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Auditory System (hearing)

Sound

•  Vibrating object displaces molecules in a wave pattern

Sound

•  Vibrating object displaces molecules in a wave pattern

Sound

•  Vibrating object displaces molecules in a wave pattern

•  Animation: www.acs.psu.edu/drussell/

Demos/waves-intro/wavepulse.gif

Sound wave plot Properties

•  Frequency  –  cycles/second  (Hertz,  Hz)  •  Amplitude  –  height  of  the  wave  •  Phase  –  beginning  point  

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Properties Complex waveforms

Complex waveforms: beats example Anatomy

Impedance matching Acoustic reflex

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Inner ear Inner ear

Inner ear

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Video overview

www.youtube.com/watch?v=PeTriGTENoc