Frequency dependence of binaural interaction in the auditory brainstem and middle latency responses.

Purpose: The primary purpose of this investigation was to determine the relative frequency representation of binaural function in the brainstem and cortex of adults. The secondary purpose was to compare adult responses to previously reported infant responses.

Methods: Simultaneous auditory brainstem responses and auditory middle responses were recorded monaurally and binaurally in 20 young women.

Parameters to maximize 2f2-f1 distortion product otoacoustic emission levels.

Purpose: Past research has established parameters for the 2f1-f2 distortion product otoacoustic emissions (DPOAEs) that enhance response levels (e.g., L1 - L2 = 10 dB; f2/f1 = 1.