CSD 230 exam 4 Questions and Answers Already Passed Latest Update 2025-2026
cochlear implants are similar to... - Answers BTE hearing aids (microphone, amplifier, receiver)
cochlear implants aid in... - Answers speech reading at worst, at best person can hear and
understand speech even with the profound hearing loss
Electrode - Answers used to stimulate the auditory nerve directly with electric current, bypassing
the damaged cochlear structures
ideal candidates of cochlear implants... - Answers those who have acquired profound hearing
loss after acquiring language skills
cochlear implants are implanted in... - Answers 1-3 year old deaf children (some as young as 3-
12 months now)
body aids - Answers not really used now
BTE - Answers behind the ear- popular now
ITE - Answers in the ear- most popular previously
ITC - Answers in the canal- smaller than the ITE
CIC - Answers completely in the canal- smallest and most cosmetically apealing
BAHA - Answers bone anchored hearing aid- used with deformed outer ear (atresia, microtia);
conductive or mixed hearing loss; chronic ear infections; SSD (single sided deafness)
RIC (receiver in canal) - Answers receiver in the ear on an RITE- most popular now
hearing aids are the most beneficial for... - Answers those with moderate hearing loss between
40-85 db HL
hearing aids: general guidelines fitting aids are usually based on - Answers the PTA of the better
ear
exceptions - Answers there are always exceptions to this rule based on the lifestyle and needs
of the client
purpose of a well fit hearing aid - Answers to make sounds audible, without causing discomfort
from sounds that are too loud
a well fit hearing aid... - Answers amplifies the sounds that are important for hearing and
understanding speech, while reducing the background sounds that can mask speech
noise reduction and directional microphones - Answers allow the speech signal to "pop out"
from the back ground noise
, gain - Answers the amount of amplification provided by the hearing aid
a well fit hearing aid should - Answers provide the most gain at the frequencies where the client
shows the most amount of hearing loss
gain equals... - Answers the difference in dB between the input level and output level at
particular frequency. 40 dB input with 60 dB output equals 20 dB of gain (60-40=20)
OSPL- output sound pressure level - Answers the maximum output level of the hearing aid, also
called the maximum power outlet
LDL- loudness discomfort level - Answers the level at which sound is uncomfortably loud
OSPL should not exceed the clients... - Answers LDL
if the OSPL exceeds the clients LDL - Answers sounds will be uncomfortably loud and may even
cause pain
analog aids - Answers amplify sounds equally
digital aids use... - Answers digital signal processing to recognize steady state background
noise and reduce it, while continuing to amplify the variable speech signal
in order to reduce feedback (whistling) with analog aids - Answers you need to reduce overall
gain (amplification) of the aid which limits the amount of useable hearing for the client
digital aids use digital signal processing strategies, such as... - Answers 180 degree phase
cancellation, which allows them to reduce feedback without reducing gain
digital aids can reduce what? - Answers acoustic feedback and reduce background noise
without reducing gain (amplification) of the speech signal
this is great improvement over analog technology - Answers true
compression or WDRC (wide dynamic range comprehension) - Answers a technique used to
decrease or limit the wide range of sounds in the everyday world to match more closely the
limited dynamic range of listeners with hearing loss. compression circuits are non-linear
microphone - Answers converts an acoustic signal into an electrical signal
receiver - Answers converts an amplified electrical signal back into an acoustic signal (sound
wave)
a hearing aid is a mini... - Answers PA system with microphone, amplifier and receiver (loud
speaker)
the frequency range of most hearing aids - Answers in the 110-9500 hz range
cochlear implants are similar to... - Answers BTE hearing aids (microphone, amplifier, receiver)
cochlear implants aid in... - Answers speech reading at worst, at best person can hear and
understand speech even with the profound hearing loss
Electrode - Answers used to stimulate the auditory nerve directly with electric current, bypassing
the damaged cochlear structures
ideal candidates of cochlear implants... - Answers those who have acquired profound hearing
loss after acquiring language skills
cochlear implants are implanted in... - Answers 1-3 year old deaf children (some as young as 3-
12 months now)
body aids - Answers not really used now
BTE - Answers behind the ear- popular now
ITE - Answers in the ear- most popular previously
ITC - Answers in the canal- smaller than the ITE
CIC - Answers completely in the canal- smallest and most cosmetically apealing
BAHA - Answers bone anchored hearing aid- used with deformed outer ear (atresia, microtia);
conductive or mixed hearing loss; chronic ear infections; SSD (single sided deafness)
RIC (receiver in canal) - Answers receiver in the ear on an RITE- most popular now
hearing aids are the most beneficial for... - Answers those with moderate hearing loss between
40-85 db HL
hearing aids: general guidelines fitting aids are usually based on - Answers the PTA of the better
ear
exceptions - Answers there are always exceptions to this rule based on the lifestyle and needs
of the client
purpose of a well fit hearing aid - Answers to make sounds audible, without causing discomfort
from sounds that are too loud
a well fit hearing aid... - Answers amplifies the sounds that are important for hearing and
understanding speech, while reducing the background sounds that can mask speech
noise reduction and directional microphones - Answers allow the speech signal to "pop out"
from the back ground noise
, gain - Answers the amount of amplification provided by the hearing aid
a well fit hearing aid should - Answers provide the most gain at the frequencies where the client
shows the most amount of hearing loss
gain equals... - Answers the difference in dB between the input level and output level at
particular frequency. 40 dB input with 60 dB output equals 20 dB of gain (60-40=20)
OSPL- output sound pressure level - Answers the maximum output level of the hearing aid, also
called the maximum power outlet
LDL- loudness discomfort level - Answers the level at which sound is uncomfortably loud
OSPL should not exceed the clients... - Answers LDL
if the OSPL exceeds the clients LDL - Answers sounds will be uncomfortably loud and may even
cause pain
analog aids - Answers amplify sounds equally
digital aids use... - Answers digital signal processing to recognize steady state background
noise and reduce it, while continuing to amplify the variable speech signal
in order to reduce feedback (whistling) with analog aids - Answers you need to reduce overall
gain (amplification) of the aid which limits the amount of useable hearing for the client
digital aids use digital signal processing strategies, such as... - Answers 180 degree phase
cancellation, which allows them to reduce feedback without reducing gain
digital aids can reduce what? - Answers acoustic feedback and reduce background noise
without reducing gain (amplification) of the speech signal
this is great improvement over analog technology - Answers true
compression or WDRC (wide dynamic range comprehension) - Answers a technique used to
decrease or limit the wide range of sounds in the everyday world to match more closely the
limited dynamic range of listeners with hearing loss. compression circuits are non-linear
microphone - Answers converts an acoustic signal into an electrical signal
receiver - Answers converts an amplified electrical signal back into an acoustic signal (sound
wave)
a hearing aid is a mini... - Answers PA system with microphone, amplifier and receiver (loud
speaker)
the frequency range of most hearing aids - Answers in the 110-9500 hz range
