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CD 444 Exam 2 questions and correct answers
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CD 444 Exam 2 questions and correct answers
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CD 444 Exam 2Hearing Aids - correct answer ✔✔Amplify frequency where hearing loss occurs
Gain - correct answer ✔✔Amount by which signal is amplified
output-input=
Dynamic Range - correct answer ✔✔Range of hearing between threshold and loudness discomfort level
Normal threshold/range - correct answer ✔✔120 dB; 0-120dB
Hearing Impaired Threshold/Range - correct answer ✔✔105-55dB; 50dB
Hearing Aid Travel - correct answer ✔✔input signal--> picked up by microphone-> converts to electric or
digital signal--> amplified-> receiver converts back to acoustic--> output signal delivered into ear canal
Digital - correct answer ✔✔microchip based, fit to individual loss, multiple memories for different
environments
Behind-the-ear BTE - correct answer ✔✔using ear mold that's replaced periodically, made from
impression of the ear and children will outgrow.
most powerful
for severe to profound loss
lowest repair rate
longest life expectancy
Slim tubing: less visible, not custom made, natural sound
In-the-ear ITE - correct answer ✔✔fit in shell in concha and ear canal
, full shell-in-ear - correct answer ✔✔fits all of concha, largest ITE
elderly, easy to manage
in-the-canal - correct answer ✔✔fills opening of canal, medium ITE
completely-in-the-canal - correct answer ✔✔fills canal, smaller ITE
lots of repair, fit must be exact
MFI (made for iPhone) Aid - correct answer ✔✔synced to phone
remote control
call streaming
Cost of Hearing Aids - correct answer ✔✔as technology advances, cost increases
accessories add to cost
funding for children but difficult to find to adults
not covered by insurance or medicare
Monaural - correct answer ✔✔one aid
not best practice (good for some unilateral)
not 360 hearing
trouble localizing
auditory nerve in unaided ear is not stimulated which is not good for auditory processing
Binaural - correct answer ✔✔two aids
speech perception is better
hear 360
best stimulation for CA pathway
improves localization
one ear at a time
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