Department of Speech, Language and Hearing Sciences

Magnitude and phase input–output functions were obtained from human subjects using a range of stimulus levels, frequencies, and frequency ratios to investiage the mechanisms responsible for growth of 2f1-f2 otoacoustic emission.  Results coupled with modeling indicated that multiple factors contribute to the complexity of growth of the2f1-f2 otoacoustic emission in humans and highlight the importance of looking at phase in addition to magnitude when interpreting distortion product otoacoustic emission growth.