BAERs – CNIM Exam Questions with Correct
Answers
What are the 2 BAER montages? State their laterality.
1.) A1-Cz (LEFT)
2.) A2-Cz (RIGHT)
What are the LFF and HFF for BAERs?
LFF: 10Hz-30Hz
RFF: 2500Hz-3000Hz
What is the BAER sensitivity?
0.2uV/Div-0.5uV/Div
What is the analysis time for BAERs?
15 milliseconds/Div
How many trials are in one run of BAERs?
500-1000
What is the major ABR Frequency?
1200Hz
What is the stimulus for BAERs? Both in dB HL and peSPL
60-70dbHL = 100peSPL
What is masking in terms of BAERs?
,Masking is a noise that is implemented to the contralateral auditory pathway that is utilized to
make certain that we are only monitoring the ipsilateral auditory pathway.
What frequency is masking imlemented at?
30Hz-40Hz = 60peSPL
What are 3 common Rep Rates for BAERs?
31.33Hz; 27.11Hz; 17.33Hz
Above what rep rate frequency quickly acquires Waves I and V but can possible
degrade Wave III?
>30Hz
Above what rep rate frequency degrades all BAER waveforms?
>50Hz
What are the clicks utilized to elicit BAERs? What are 2 major characteristics of these
clicks?
Broad Band Clicks
1.) 100uSec square wave pulses
2.) Large range of possible frequencies
What are the 3 BAER polarities?
1.) Rarefaction
2.) Condensation
, 3.) Alternating
What are 4 characteristics of the Rarefaction BAER polarity?
1.) Negative pressure pulse
2.) Pulls tympanic membrane away from midline
3.) Short Latency
4.) Amplifies Wave I
What are 4 characteristics of the Condensation BAER polarity?
1.) Positive pressure pulse
2.) Pushes tympanic membrane toward midline
3.) Long latency
4.) Amplifies Wave V
What is the Alternative BAER polarity? What are 2 major advantages of utilizing this
polarity?
Goes back-and-forth between using condensation and rarefaction.
1.) Decreases stimulation artifact
2.) Eliminates cochlear microphonic
Answers
What are the 2 BAER montages? State their laterality.
1.) A1-Cz (LEFT)
2.) A2-Cz (RIGHT)
What are the LFF and HFF for BAERs?
LFF: 10Hz-30Hz
RFF: 2500Hz-3000Hz
What is the BAER sensitivity?
0.2uV/Div-0.5uV/Div
What is the analysis time for BAERs?
15 milliseconds/Div
How many trials are in one run of BAERs?
500-1000
What is the major ABR Frequency?
1200Hz
What is the stimulus for BAERs? Both in dB HL and peSPL
60-70dbHL = 100peSPL
What is masking in terms of BAERs?
,Masking is a noise that is implemented to the contralateral auditory pathway that is utilized to
make certain that we are only monitoring the ipsilateral auditory pathway.
What frequency is masking imlemented at?
30Hz-40Hz = 60peSPL
What are 3 common Rep Rates for BAERs?
31.33Hz; 27.11Hz; 17.33Hz
Above what rep rate frequency quickly acquires Waves I and V but can possible
degrade Wave III?
>30Hz
Above what rep rate frequency degrades all BAER waveforms?
>50Hz
What are the clicks utilized to elicit BAERs? What are 2 major characteristics of these
clicks?
Broad Band Clicks
1.) 100uSec square wave pulses
2.) Large range of possible frequencies
What are the 3 BAER polarities?
1.) Rarefaction
2.) Condensation
, 3.) Alternating
What are 4 characteristics of the Rarefaction BAER polarity?
1.) Negative pressure pulse
2.) Pulls tympanic membrane away from midline
3.) Short Latency
4.) Amplifies Wave I
What are 4 characteristics of the Condensation BAER polarity?
1.) Positive pressure pulse
2.) Pushes tympanic membrane toward midline
3.) Long latency
4.) Amplifies Wave V
What is the Alternative BAER polarity? What are 2 major advantages of utilizing this
polarity?
Goes back-and-forth between using condensation and rarefaction.
1.) Decreases stimulation artifact
2.) Eliminates cochlear microphonic
