What is immittance testing
Measuring how easily sound travels from air to bone gives information about mobility
What are the two types of immittance testing
Tympanometry
Acoustic reflex
What is tympanometry
Test of the tympanic membrane mobility
you can visualizes the relationship between air pressure in the ear canal and movement of the ear drum and ossicular chain tone hits your ear drum gets reflected back and gets picked up by the tympanometry
What are the three types of tympanograms
Type A is normal where there is a spike at zero
Type B is suggestive of middle ear fluid or punctured eardrum and its just flat
Type C off center suggestive of Eustachian tube malfunction
What is the acoustic reflex
Involuntary contraction of stapedius muscle in middle ear
Protective reflex to prevent extremely loud sounds from damaging cochlea
What is the acoustic reflex testing
Response to loud sound is tested using probe often same device as used for tympanometry absence of response can suggest middle ear problem severe SNL or brainstem disorder
What is electrophysiological testing
No behavioural response required and is used for hard to test people to identify auditory lesion site
What is otoacoustic emission testing
Measured via probe if there is lack of OAEs suggest cochlear (hair cell) damage
What is auditory brainstem response
EEG measurement of response to clicks via 3-4 electrodes evaluate 5 peaks reflecting electrical response to sound traveling through brainstem
Missing or delayed peak suggests sensorieneural loss of neurological dysfunction
What are example of techniques of aural rehabilitation
Selection of hearing aids or other amplification devices
Speechreadign
Auditory traning
Teaching strategies to facilitate communication and reapir communication breakdowns
Whats the difference between rehabilitation and habilitation
Rehabilitation is for those who once had normal hearing but now have hearing impairment
habilitation is for people who have hearing impairment from birth
What are some different ways of hearing rehabilitation
It is a direct treatment of the hearing loss
Surgery
Hearing aid fitting
Auditory implants
What are some ways of speech and language rehabilitation
Facilitating communication for people with hearing loss
Speech reading
Cued speech
Oral/aural approach
Manual approach
Simultaneous communication
What are some treatment approaches for speech and language rehabilitation
Facilitating communication for people with hearing loss
Speech reading
Cued speech
Oral/aural approach
Manual approach
Simultaneous communication
What is myringotomy
Incision in tympanic membrane
Insertion of PE tubes helps drain some of the fluid
What is tympanoplasty
Repair perforated eardrum or reconstruc middle ear bones
What are the three main components of a hearing aid
Michrophone” Transforms acoustic sginal into electrical signal
Amplifer increase the intensity of signal and filters it for only certain frequencys
Speaker converts amplified/filtered electrical signal back into acoustic signal and transmits into canal
what are the different types of hearing aids
Behind the ear
In the ear
In the canal
Completely in the canal
Body aids
What is the behind the ear
Earmold what goes in the ear
and the hearing aid its good for all types of loss and common for children
What is in the ear hearing aid
Custom molded to fit ear
for mild to severe hearing loss
What is the in the canal for
Mild moderate loss
What is completely in the canal
Sits closest to the TM shorter battery life mild to moderate lossW
What is the body aid
Battery pack and amplifier and profound loss
What are assitive listening devices
Improve signal to noise ratio and helps amplify sound so a teacher could have it on and the sound could focus on that teacher spoking
