Case 4 Otoacoustic Emissions

Here again is a summary of the hearing threshold data.

500 1000 2000 4000
Right Ear 20 50 55 75
Left Ear 20 45 60 70

The otoacoustic emission data were obtained using distortion product otoacoustic emissions testing.  In the table below is a summary of the number of dB that the emission is above the noise floor.

500 1000 2000 4000
Right Ear 6 1 -2 0
Left Ear 6 -1 -1 1
  •        What level of OAE amplitude above floor noise is considered a reliable indicator of outer hair cell function?  Where is this seen?  Does that correlate to the audiometric data, or do the results show discrepant findings?