Frequency-specific, location-nonspecific adaptation of interaural time difference sensitivity.
Human listeners' sensitivity to interaural time differences (ITD) was assessed for 1000 Hz tone bursts (500 ms duration) preceded by trains of 500-ms "adapter" tone bursts (7 s total adapter duration, frequencies of 200, 665, 1000, or 1400 Hz) carrying random ITD, or by an equal-duration period of silence. Presentation of the adapter burst train reduced ITD sensitivity in a frequency-specific manner. The observed effect differs from previously described forms of location-specific psychophysical adaptation, as it was produced using a binaurally diffuse sequence of tone bursts (i.e., a location-nonspecific adapter stimulus). Results are discussed in the context of pre-binaural adaptation.
Department of Speech & Hearing Sciences, University of Washington, 1417 NE 42nd St., Seattle, WA 98105, USA. andrewdb@uw.edu
Andrew D
AD
Brown
Marina S
MS
Kuznetsova
William J
WJ
Spain
G Christopher
GC
Stecker
D000161:Acoustic Stimulation; D000222:Adaptation, Physiological; D001307:Auditory Perception / Q000502:physiology*; D001309:Auditory Threshold / Q000502:physiology; D006801:Humans; D011571:Psychoacoustics; D013017:Sound Localization / Q000502:physiology*; D013997:Time Factors