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Application of ABR in Objective Assessment of Infant Hearing

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1.  Frequency specific ABRs are elicited with which of the following stimuli:
  1. Tone bursts
  2. White noise
  3. Clicks
  4. All of the above
2.  An appropriate analysis time for low frequency tone-burst evoked ABR measurement is:
  1. 10 ms
  2. 20 ms
  3. 50 ms
  4. 100 ms
3.  One strategy for speeding up test time in frequency-specific ABR measurement:
  1. Use masking in the non-test ear
  2. Stop signal averaging when the signal to noise ratio is adequate
  3. Always present 2000 stimuli when averaging an ABR
  4. Use an analysis time of 10 ms versus 15 ms
4.  Which answer best describes the relation between tone burst frequency and wave V latency.
  1. There is no relation
  2. Latency is longer for higher frequency tone bursts
  3. Latency is longer for lower frequency tone bursts
  4. Latency is equivalent for tone burst and click stimuli
5.  In ABR recording, reversal of waveforms with the reversal of stimulus polarity is most consistent with:
  1. An ABR
  2. An artifact
  3. An action potential (AP)
  4. Cochlear microphonic (CM)
6.  In recording an ABR, a likely advantage of chirp stimulation versus convention stimulation is:
  1. Shorter latency for wave V
  2. Longer latency for wave V
  3. Smaller amplitude for wave V
  4. Larger amplitude for wave V
7.  Which of the following confirms ear-specific bone conduction ABR findings.
  1. A clear wave V
  2. Wave I from the contralateral electrode array
  3. Wave I in the ipsilateral electrode array
  4. 40 dB of narrow-band masking noise
8.  Which of the following types of transducers is best for routine ABR measurement.
  1. TDH earphones
  2. Circum-aural earphones
  3. Loudspeakers
  4. Insert earphones
9.  A high-pass filter setting of 30 Hz is important in ABR measurement because..
  1. Infant ABRs are dominated by low frequency energy
  2. A 30 Hz filter setting removes muscle artifact
  3. Infant ABRs are dominated by high frequency energy
  4. Other filter settings are not an option on clinical ABR systems
10.  Which of the following is NOT an option for un-sedated ABR measurement in infants
  1. Testing is conducted immediately after feeding
  2. The baby is sleep deprived
  3. Testing is conducted first thing in the morning
  4. Propofol is administered

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