Marking these waves is a challenge.  Reasonable audiologists could disagree.  Keep the cardinal rules in mind: does it replicate and is it larger than control run activity?  Don’t mark it if it doesn’t meet those tests.  Here, the “control run” will be the level of activity seen when the audiologist presents below threshold.  However, keep looking at the number of rejected traces.  If the “control run equivalent” no response has just a few rejected sweeps, and a later trace has many rejected sweeps, then comparing those traces is less helpful.

You might wonder why so many sub-threshold runs were obtained for the right ear.  Remember that the first number of the trace identification tells you the order of testing.  You can thus see the order of testing – Right 50 / 70 / 80 / 90.  ”Everybody’s a Monday morning quarterback” referred to office discussions after the Sunday night game and what “I would have done”. Similarly it’s easier to determine what runs should have been obtained after the results are in front of you.

Case 8 reviewed stimulus artifact and waves I, III and V resembling stimulus artifact.  These concepts still apply. Consider the time at which an artifact should occur, and the time at which you should see wave V.  The absence of an OAE means that it is unlikely any of the waves are cochlear microphonic.

• Mark all present waves.