The ABR waveforms shown below were collected.  The parameters were as follows.

Rarefaction click stimuli, 33.1 per second

30-1500 Hz filtering

2000 sweeps per run, artifact rejection enabled.

Cz-Ai montage

• Determine if the waveforms represent normal findings.
• Describe the click threshold and interpret it. What does it add to the diagnostic picture that OAE testing did not already elucidate?
• Critique the testing.  Is it sufficient?