SPAA 344 EXAM 2 2025 QUESTIONS AND
ANSWERS
Parts on hearing aids - ANS microphone, amplifier, receiver
microphone - ANS Picks up sound, on outside of hearing aid
Every hearing aid has a microphone, some even have 2
Mic in the front is the actual mic and the one in the back is the directional mic
If it does not work, we cannot pick up sound
amplifier - ANS Amplifies the sound in the hearing aid
receiver - ANS Where the sound comes out of the speaker, If it does not work, we cannot
produce sound
Intermodulation - ANS Multiple frequencies causing problems
500 and 300 Hz>-----
> 500, 300, 200, 800, 600, 1000 Hz
Harmonic - ANS Frequency specific
500 Hz>-------
>500, 1000, 1500, 2000 Hz
1|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
, Impact of each of these types of distortion on speech discrimination - ANS Causes hearing
aid to make unwanted sounds and difficulties with speech discrimination
Body - ANS Used in third world countries, we dont use
BTE - ANS Located behind the ear, has a hook that attaches to the ear mold
Used with ears with medical problems (curved ear canal, microtia, constant drainage, open
perforation, with any fluid coming out, cauliflower ear
Superpower BTE- most powerful
RIC-receiver in canal, all in the ear canal open BTE
Thin tube BTE_ open BTE, not in the ear, little as possible in the canal, less power due to sound
escaping
RICS and thin tubes - don't plug you up or make an echo sound, keeps the ear canal as open as
possible
advantages of BTE - ANS Advantages: can be fit to any motivated HI person, has a lot of
flexibility with features, great gain and MPO than smaller aids, Tcoil is stronger, only the ear
molds needs to be replaced over time, DAI if available, suitable for ears with medical problems
disadvantage of BTE - ANS more conspicuous than smaller aids, may fall off during work or
recreation, may seem more difficult to insert, remove, and a just volume control that a smaller
hearing aid
ITE - ANS Completely fill concha and ear canal
advantages of ITE - ANS small and therefore more acceptable, better mic placement that
BTE, more secure fit, easy to insert and remove, and to adjust the volume
2|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
ANSWERS
Parts on hearing aids - ANS microphone, amplifier, receiver
microphone - ANS Picks up sound, on outside of hearing aid
Every hearing aid has a microphone, some even have 2
Mic in the front is the actual mic and the one in the back is the directional mic
If it does not work, we cannot pick up sound
amplifier - ANS Amplifies the sound in the hearing aid
receiver - ANS Where the sound comes out of the speaker, If it does not work, we cannot
produce sound
Intermodulation - ANS Multiple frequencies causing problems
500 and 300 Hz>-----
> 500, 300, 200, 800, 600, 1000 Hz
Harmonic - ANS Frequency specific
500 Hz>-------
>500, 1000, 1500, 2000 Hz
1|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
, Impact of each of these types of distortion on speech discrimination - ANS Causes hearing
aid to make unwanted sounds and difficulties with speech discrimination
Body - ANS Used in third world countries, we dont use
BTE - ANS Located behind the ear, has a hook that attaches to the ear mold
Used with ears with medical problems (curved ear canal, microtia, constant drainage, open
perforation, with any fluid coming out, cauliflower ear
Superpower BTE- most powerful
RIC-receiver in canal, all in the ear canal open BTE
Thin tube BTE_ open BTE, not in the ear, little as possible in the canal, less power due to sound
escaping
RICS and thin tubes - don't plug you up or make an echo sound, keeps the ear canal as open as
possible
advantages of BTE - ANS Advantages: can be fit to any motivated HI person, has a lot of
flexibility with features, great gain and MPO than smaller aids, Tcoil is stronger, only the ear
molds needs to be replaced over time, DAI if available, suitable for ears with medical problems
disadvantage of BTE - ANS more conspicuous than smaller aids, may fall off during work or
recreation, may seem more difficult to insert, remove, and a just volume control that a smaller
hearing aid
ITE - ANS Completely fill concha and ear canal
advantages of ITE - ANS small and therefore more acceptable, better mic placement that
BTE, more secure fit, easy to insert and remove, and to adjust the volume
2|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
