Abstract
Dichotic clicks were presented at 70 dB nHL to a group of 12 otologically normal male subjects. The clicks to one ear were attenuated by either 6 or 12 dB. Subjects were instructed to delay the onset of the click delivered to the contralateral ear until a single image was perceived at the center of their head. These same stimuli were then employed to evoke auditory brainstem responses. When the interaural intensity difference (IID) was 6 dB, a mean interaural time difference (ITD) of 151 μs effectively recentered the image. An IID of 12 dB was similarly offset by an ITD of 594 μs. A comparison of ABR latencies for time and intensity demonstrated greater differences for wave I than for wave II or V. The difference at wave I was significant for three out of four comparisons while at wave V only one out of four comparisons was significant. Differences between ABR response latencies to time versus those to intensity were most apparent as interaural differences were increased.
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