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ears
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kimkrak
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outer ear contains
pinna &
ear canal &
ear drum
pinna
visible part of ear
earcanal
sound waves travel through this
ear drum
tympanic membrane
middle ear has
ossicles
hammer
anvil
stirrup
inner ear has
cochlea which is where transduction occurs
& semi-circular canals
where is sound made into neural impulses
cochlea
semi circular canals contain
vestibular system
to hear we must
detect changes of air pressure in eardrum
what creates sound waves
alternating regions of high and low pressure in the air
frequency
waves/seconds
pitch
related to frequency
pitch is what our brain percieves
amplitude
height, intensity, & amount of energy in wave
waveform
determines timbre of sound we percive
how are sounds transmitted
eardrum vibratons passed through middle ear bones then to cochlea
basilar membrane
sepertes chambers
hair cells
converts sound waves into neural impulses
after vibrations hit thew cochlea then
oval window moves in & out causeing pressure in outer chamber to change quickly
after the oval window it causes
ripples in the basilar membrane
after bailar membrane
the hair cells bend causing neural impulses
neural impulses are picked up by the
auditory nerve
after the auditory nerve impulses ar etaken to
thalamus
after thalamus then the
auditory cortex
place theory
we sense pitch bc hair cells move in different places in the cochlea
frequency theory
we snense pitch becaus ehair ce;s fore at different rates in the cochlea
conduction deafness
problem with system of condution the sound
nerve deafness
hair celld in cochlea are damaged usually by loud noise
Author:
kimkrak
ID:
312280
Card Set:
ears
Updated:
2015-11-30 21:18:24
Tags:
psyc
Folders:
Psyc
Description:
test 4
Show Answers:
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