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cd 444 exam 2 Study Guide Solutions Updated 2024 hearing aids amplify - ANSWER-frequencies where hearing loss occurs (not give back normal hearing) (output can never exceed loudness discomfort level) HA ideally - ANSWER-make soft sounds audible, average sounds comfortable, and loud sounds tol...

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  • November 26, 2024
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  • 2024/2025
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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


hearing aids amplify - ANSWER✔✔-frequencies where hearing loss occurs

(not give back normal hearing) (output can never exceed loudness

discomfort level)


HA ideally - ANSWER✔✔-make soft sounds audible, average sounds

comfortable, and loud sounds tolerable


gain - ANSWER✔✔-the amount by which a signal is amplified (output -

input = gain)


frequency response - ANSWER✔✔-the frequency region amplified by

hearing aid (only where hearing loss occurs)


dynamic range of hearing - ANSWER✔✔-range of hearing between

threshold and loudness discomfort level, range of usable hearing


people with SNHL often have - ANSWER✔✔-reduced loudness tolerance



Copyright ©EMILLYCHARLOTE 2025 ACADEMIC YEAR, ALL RIGHTS RESERVED. Page 1/20

,normal dynamic range of hearing - ANSWER✔✔-110 dB LDL - 0 dB

threshold = 110 dB DR


reduced dynamic range - ANSWER✔✔-95 dB LDL - 55 dB threshold = 40

dB DR


normal listener can - ANSWER✔✔-use sound occurring between 0 dB and

110 dB or over a range of 110 dB


hearing aid components - ANSWER✔✔-input - microphone - amplifier -

receiver - output


input signal is - ANSWER✔✔-picked up by microphone which converts it

from acoustic to electric or digital signal


signal is - ANSWER✔✔-amplified


receiver converts - ANSWER✔✔-signal back to acoustic energy


output signal is - ANSWER✔✔-delivered into ear canal


analog - ANSWER✔✔-traditional transistorized electronic circuits, no

longer commonly used


digital - ANSWER✔✔-microchip based technology

Copyright ©EMILLYCHARLOTE 2025 ACADEMIC YEAR, ALL RIGHTS RESERVED. Page 2/20

, (programmed to fit individual HL using computer technology, can have

multiple memories for different listening environments, can process sound

in ways that are much more sophisticated than analog hearing aids, some

can be used with remote controls or other wireless accessories, range of

costs and options)


in the ear HA - ANSWER✔✔-full shell, in the canal, completely in canal


behind the ear HA - ANSWER✔✔-traditional with ear mold, newer design

with slim tube and rip or RIE


behind the ear with ear mold - ANSWER✔✔-instrument fits behind the ear

and connects to an earmold that fits in the ear, armold is custom made for

individual


ear mold styles and material are chosen depending on - ANSWER✔✔-

degree of hearing loss and personal preference


ear molds have to be - ANSWER✔✔-replaced frequently (made from

impression of person's ear, children outgrow them, changes in weight can

affect fit)


HA can come in - ANSWER✔✔-variety of colors

Copyright ©EMILLYCHARLOTE 2025 ACADEMIC YEAR, ALL RIGHTS RESERVED. Page 3/20

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