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CD 444 Exam 2 Study Guide Solutions Updated 2024

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CD 444 Exam 2 Study Guide Solutions Updated 2024 4 Parameters to look at when diagnosing hearing loss - ANSWER-- determine unilateral or bilateral hearing loss -degree of hearing loss -type of hearing loss -configuration (shape of audiogram) Audiogram - ANSWER--anything red is right ear -an...

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  • November 26, 2024
  • 31
  • 2024/2025
  • Exam (elaborations)
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  • CD 444
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EmillyCharlotte
CD 444 Exam 2 Study Guide Solutions
Updated 2024


4 Parameters to look at when diagnosing hearing loss - ANSWER✔✔--

determine unilateral or bilateral hearing loss


-degree of hearing loss


-type of hearing loss


-configuration (shape of audiogram)


Audiogram - ANSWER✔✔--anything red is right ear


-anything blue is left ear


-test 250-8,000 Hz (speech sounds)


-intensity is down the side of the graph


- >= bone conduction


- x= air conduction




Copyright ©EMILLYCHARLOTE 2025 ACADEMIC YEAR, ALL RIGHTS RESERVED. Page 1/31

,Vibrotactile Response - ANSWER✔✔--frequency of bone conductor is so

low it vibrates and person responds to vibration even if the sound isnt

heard


Hearing Aids - ANSWER✔✔--hearing instruments


-infants can be identified w HL and given hearing aids as young as 4 weeks

old


-amplify frequencies where hearing loss occurs


-ideally


make soft sounds audible


make average sounds comfortable


make loud sounds tolerable


Hearing aid gain - ANSWER✔✔--gain is the amount by which each sound

is amplified


-ex; 50 dB going in, 95 dB comes out, 45 dB gain


Frequency Response - ANSWER✔✔--frequency response is the frequency

region amplified by hearing aid

Copyright ©EMILLYCHARLOTE 2025 ACADEMIC YEAR, ALL RIGHTS RESERVED. Page 2/31

,-hearing aid amplifies only where hearing loss occurs


Dynamic range of hearing - ANSWER✔✔--person w sensorineural hearing

loss often have reduced loudness tolerance


-range of usable hearing


-range of hearing between threshold and loudness discomfort level


Normal Dynamic Range - ANSWER✔✔--110 dB LDL- 0 dB threshold=110

dB DR


Reduced Dynamic Range - ANSWER✔✔--95 dB LDL-55 dB threshold=40

dB DR


How Hearing Aids Work - ANSWER✔✔--input signal is picked up by

microphone which converts it to electrical signal


-signal is amplified


-receiver converts signal to acoustic energy


-output signal is delivered into ear canal


Level of hearing instruments technology - ANSWER✔✔--analog


-digital
Copyright ©EMILLYCHARLOTE 2025 ACADEMIC YEAR, ALL RIGHTS RESERVED. Page 3/31

, Analog Hearing Aid - ANSWER✔✔--traditional transistorized electronic

circuits


-no longer commonly used


Digital Hearing Aid - ANSWER✔✔--microchip technology


-programmed to each individual hearing loss


-memory


-remote controls, etc


-high end


Type of Hearing Aids - ANSWER✔✔--in-the-ear


-behind the ear


In-The-Ear - ANSWER✔✔--full shell


-in-the-canal


-completely-in-canal


Behind-The-Ear - ANSWER✔✔--traditional w earmold


-newer design w slim tube and tip or RIE (receiver in the ear)


Copyright ©EMILLYCHARLOTE 2025 ACADEMIC YEAR, ALL RIGHTS RESERVED. Page 4/31

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