exam 4 Flashcards
(33 cards)
what are the two parts of the outer ear
pina
ear canal
function of Pina
finals noise to ear drum
function of ear canal
amplify / louder
what are the two middle ear functions
overcome impedance mismatch
vestation tube- air pressure in ear
explain the difference between air conduction and bone conduction
air conduction:
- uses headphones to set noise signals into canal
- looks at entire system
bone conduction:
- device put behind ear to send signals directly to cochlea
- bypasses out and middle ear
how are the air and bone conduction used to determine whether someone has a conductive or sensorineural loss
what is impedance mismatch
there’s vibrations in the air -> in middle ear ossicles, -> s to small oval window -> fluid in mid ear overcomes mismatch
why is impedance mismatch important
what classifications of hearing loss are hearing aids used for
mild/moderate/severe hearing loss
what are three instrumental techniques that have had a large impact on clinical diagnostic practice
air fondue, bone conduction, and typhonametry
what are useful hearing subs for people who have had different types of hearing loss, with examples
conductive- medical treatment
sensorneural- hearing aids, assisted hearing device, cochlear implant
HA and AHD = loudness / amplify
CI- ___
what are the three tiny bones in the ear
MIS
Mallus (hammer - mallet)
Incus
Stapes
where are the ossicles located
middle ear
what do ossicles do
to transfer and amplify air vibrations into the inner ear to be processed as sound
correct impedence mismatch
would an audiologist recommend a CI for someone with mod to mild earring loss. why or why not
no!!
implant would make it worse, recommend hearing aid or assisted hearing device
why is tympanometry
test of middle ear efficiency
what is tympanometry used for
if there is an obstruction of the mid ear
what is the air-bone gap
term for different in threshold of headphones and bone osolators
what is conductive hearing loss
something wrong in outer or middle ear
a pacient comes in with complaints of earaches and redness in outer ear. they came back from a vacation where they were swimming in pools and lakes. they have swimmers ear. what type of hearing loss would this be and what is the treatment
conductive, with antibiodics (treatable)
contrast hearing aids and cochlear implant
- price
- degree of hearing loss
- battery in HA is small
compare hearing aids and cochlear implant
what are three elements that go into describing a hearing loss
type, degree, configuration
describe the relationship between otitis media and reading disability
