Restarting the adapted binaural system.
Previous experiments using trains of high-frequency filtered clicks have shown that for lateralization based on interaural difference of time or level, there is a decline in the usefulness of interaural information after the signal's onset when the clicks are presented at a high rate. This process has been referred to as "binaural adaptation." Of interest here are the conditions that produce a recovery from adaptation and allow for a resampling of the interaural information. A train of clicks with short interclick intervals is used to produce adaptation. Then, during its course, a treatment such as the insertion of a temporal gap or the addition of another "triggering" sound is tested for its ability to restart the binaural process. All of the brief triggers tested are shown to be capable of promoting recovery from adaptation. This suggests that, while the binaural system deals with the demands of high-frequency stimulation with rapid adaptation, it quickly cancels the adaptation in response to stimulus change.
Hafter
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Department of Psychology, University of California, Berkeley 94720.
Buell
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D001288:Attention; D001307:Auditory Perception; D001309:Auditory Threshold; D004292:Dominance, Cerebral; D006801:Humans; D010897:Pitch Discrimination; D011571:Psychoacoustics; D011930:Reaction Time; D013998:Time Perception