2003 Volume 46 Issue 1 Pages 66-73
In order to compare the relationship between evoked and distortion product otoacoustic emissions, otoacoustic emissions of 63 ears of 32 adults and 41 ears of 23 neonates and infants were measured. Several parameters including spontaneous otoacoustic emissions were studied for comparisons.
To compare evoked and distortion product otoacoustic emissions, mid-frequency of around 1.5-2kHz was found to be mostly related and this tendency was more apparent in those who spontaneous otoacoustic emissions was positive.
By plotting the X-axis of DP gram with F1 or 2F1-F2 instead of the normal F2, the S/N ratio and DP level was seen to be closely related in every frequency level of evoked otoacoustic emissions.
