Exam (elaborations)
HEARING AID DISPENSER WRITTEN EXAM QUESTIONS AND ANSWERS
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HEARING AID DISPENSER WRITTEN EXAM QUESTIONS AND ANSWERS
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Name: Score:204 Multiple choice questions
Definition 1 of 204
applied if sounds were too sharp, "clipped" off the output response, this resulted in distortion
Output compression
Peak clipping technique
type Ad tympanogram
Fixed directional microphone
Definition 2 of 204
multiple channel w/ single memory
class 2 programmable hearing aid
class 4 programmable hearing aid
class 3 programmable hearing aid
class 7 programmable hearing aid
Definition 3 of 204
tranduces the electrical energy from the microphone and IC and transduces it back to
acoustical energy
acoustic reflex
ITE custom
receiver function:
resistors / insulators
,Definition 4 of 204
air
verification definition
false negative response in testing
the elastic medium in sound
can you fit HAs with any abnormal tympanogram?
Definition 5 of 204
transitor using magnetic microphones (sufficient in speech freq and durable) 1964,
omnidirectional
Resistors / insulators
barotrauma
Fet microphone
ITE custom
Definition 6 of 204
normal pressure and compliance
output compression
type Ad tymp
class A amplifier
type A tympanogram
,Definition 7 of 204
build up of fluids in the scala media, too much production of endolymph or absorbed too
slowly resulting in pressure that damages the organ of corti. most apparent symptom: vertigo
meniere's disease aka endolymphatic hydrops
auditory neuropathy
input compression
annular ligament
Definition 8 of 204
-150 to +25 daPa
relationship of speech UCL from db HL to db SPL
formula for the need to mask in air conduction test
relationship of speech ucl from db hl to db spl
normal pressure values of TM (the force it takes)
Definition 9 of 204
5 db
what freq cannot be calculated for in a high freq avg?
unit of loudness measurement
effect of belling the end of a horn
intensity shift in central masking
Definition 10 of 204
heard and perceived later than original sound (more than 1/10s after)
reflection
echo
ultrasound
harmonic distortion
, Definition 11 of 204
abnormally acute hearing due to heightened irritability of the sensory and/or neural
mechanisms. bothered by moderate or even soft sounds
otosclerosis
presbycusis
hypoacusis
hyperacusis
Definition 12 of 204
gather sound, aid in localization, enahnce high freq bw 2k-5k hz
pinna function:
acoustic neuroma
intermodulation distortion
type Ad tympanogram
Definition 13 of 204
narrowest pass-way between scala vestibule and scala tympani
anotia
helicotrema
perilymph
oval window
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