PSYCH 7A Chapter Notes - Chapter 4: Thalamus, Cerebral Cortex, Semicircular Canals
○
3. Auditory System
● Physical dimension
○ Amplitude
○ Frequency
○ Complex sounds
● Perceptual dimension
○ Loudness
○ Pitch
○ Timbre
● The outer ear consists of the pinna and the external auditory canal
○ The pinna collects sounds and channels them into the interior of the ear
● The middle ear channels the sound through the eardrum
(or tympanic
membrane), hammer, anvil, and stirrup to the inner ear
● The function of the inner ear, which includes the oval window, cochlea, and
basilar membrane, is to convert sound waves into neural impulses and send
them on to the brain
●Place theory states that each frequency produces vibrations at a particular spot
on the basilar membrane
●Frequency theory gets at these other influences by stating that the perception of
a sound’s frequency depends on how often
the auditory nerve fires
●volley principle, which states that a cluster of nerve cells can fire neural
impulses in rapid succession, producing a volley of impulses
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PSYCH 7A Full Course Notes
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