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331 10.1 Pure Tone Threshold Testing
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variables influencing pure tone thresholds
length of the tonal stimulus
ascending v. descending techniques
instructions given to the patient
position of the ear phones
audiometer used
subject variability
the Hugheson - Westlake Technique
if they respond to sound go down 10
if they don't respind go up 5
threshold is when they respond 50% of time (test 2/3)
Testing order
do best ear first
test 1,000 Hz
test 2000 4000 8000
retest 1000
test 500 250
then the other ear 250 500 1000 2000 4000 8000
*this can change with the patient
which testing sounds are inaccurate
8000
500 and 250 because they can go through the glass in the booth
air conduction test
outer middle and inner ear (how you hear)
bone conduction test
vibration of the ear
how you hear yourself (part of it) or the drilling on a tooth
cannot test above 4000 Hz
if there is a problem with the OE ME or IE
air conduction test will be worse
if there is a problem with the IE
bone conduction and air conduction will be equal
red round mark is for the
right ear
bone conduction in the right ear is marked by
red carrots on the left side
left ear air conduction id marked by
blue Xs
left ear bone conduction is marked by
a blue carrot in the left side
hearing loss for an adult is measured by
25 dB
hearing loss for a child is measured by
15 dB
adult or child is measured by
your language capabilities
Author
shanamd2010
ID
138093
Card Set
331 10.1 Pure Tone Threshold Testing
Description
pure tone threshold testing
Updated
2/27/2012, 6:38:38 PM
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