tuning fork Flashcards
conductive hearing loss
due to an interruption of sound transmission in the outer or middle ear
sensorineural hearing loss
damage to inner ear (cochlea or auditory nerve)
why use a tuning fork test?
illustrate air and bone conduction principles, identifies type of hearing loss
air conduction
evaluates whole auditory system by presenting stimuli using headphones/ear inserts
bone conduction
passes the outer/middle ear and asses the sensitivity of ear by bone vibrator
occlusion effect
perception of increased loudness when bone conducted signal of bone conduction tone when outer ear is covered
test for HL: Schwabach
tests for hearing loss, compares persons bone conduction to normal
test for HL: Rinne
tests for conductive HL, compares air conduction to bone conduction
test for HL:Bing
tests for conductive HL, utilize occulsion effect
test for HL: Weber
test for asymmetric conductive and/or conductive HL by checking laterization at the midline of the head
auidogram symbols
RIGHT=RED O=AC
threshold
least amount of sound necessary to be heard 50% of the time
normal bone conduction is less than what number?
audiogram
visual representation of a personas threshold at given frequency and intensity