Aural Rehab exam 2 Flashcards
Prefitting Testing includes
Estimate of hearing from Auditory brain response (ABR)
Auditory steady-state response (ASSR)
Audiologic Testing is ongoing
Estimate LDL based on thresholds
Fit with hearing aids that have wide fitting range
What are fitting considerations for the pediatric patient:
- Choose BTE over custom products
- Hearing aids should have direct audio input (DAI) and telecoils for use with FM systems
- Prescriptive methods - Desired sensational level (DSL) for children and NAL for adults
- Binaural amplification
Most reliable method for verification?
Probe microphone
Why is the probe microphone the most reliable tool for verification?
Assists audiologists in making sure the child has appropriate amount of gain for soft and average speech and that loud sounds are loud but not uncomfortable.
Post fitting procedures
- parental counseling orientation and expectation
- follow-up visits more frequent for children
- monitor hearing to determine need for adjustment of hearing aids.
- monitor earmold fit-replace earmolds once a year
How often should earmolds be replaced?
once a year
How often should hearing aids and hearing be checked?
at least once a year
Troubleshooting hearing aids, why is it important?
To maximize the patient’s hearing especially if they are in treatment.
Hearing aid troubleshooting guide includes:
- visual inspection of hearing aid while individual is wearing it
- inspection of hearing aid tubing, earmold, and battery after removal
- listening check of hearing aid with listening tube or stethescope
Cause of feedback:
- earmold or hearing aid not positioned properly in ear, sticking out
- earmold tubing is torn or there is a hole in tubing
- cerumen impaction (in external auditory canal)
- volume turned up full on
Causes of no sound from hearing aid when turned on:
-hearing aid is dead
-battery is dead
-no battery
earmold or wax guard clogged with wax
Reasons hearing aid would need to be sent in for repair:
- intermittency
- distortion
- dead hearing aid
What does it mean to have an internal problem of the hearing aid?
-microphone
-receiver
amplifier
What is the primary application for FM systems?
For children in the classroom (however adults are also able to take advantage of the FM systems)
What are the four regular classroom acoustics like?
-children talking, coughing
-squeaky chairs
fan motors cycling on and off
-feet shuffling
What do the regular classroom acoustics mean for a hearing-impaired child wearing personal hearing aids?
- personal hearing aids amplify background noise
- Affecting speech perception (speech intelligibility)
- The further the hearing impaired child is from the teacher the softer the speech signal becomes
- lost opportunities for learning through the auditory channel.
What are the 3 basic conditions that negatively affect all aspects of listening for a hearing-impaired child who wears conventional hearing aids?
- Background noise
- distance from the speaker/teacher
- reverberation
____ __ ______ ratio is an important factor- it is defined as the relationship of the intensity of the signal of interest to that of background noise
signal to noise
The ____ the sound to noise ratio is the worse the listening condition
poorer
An example of sound to noise ratio: +10 dB S/N ration mean:
speech is 10 dB greater than the noise
-10 dB S/N ratio means:
noise is 10 dB greater than speech
+0 dB S/N ratio means:
speech and noise are at the same intensity level
Normal hearing children can cope with a ____ S/N ratio
+5dB
Hearing impaired children with hearing aids require a ____ to ____ dB S/N ratio
+15
20