Lateralization of noise-burst trains based on onset and ongoing interaural delays.

The Journal of the Acoustical Society of America
Richard L FreymanPatrick M Zurek

Abstract

The lateralization of 250-ms trains of brief noise bursts was measured using an acoustic pointing technique. Stimuli were designed to assess the contribution of the interaural time delay (ITD) of the onset binaural burst relative to that of the ITDs in the ongoing part of the train. Lateralization was measured by listeners' adjustments of the ITD of a pointer stimulus, a 50-ms burst of noise, to match the lateral position of the target train. Results confirmed previous reports of lateralization dominance by the onset burst under conditions in which the train is composed of frozen tokens and the ongoing part contains multiple ambiguous interaural delays. In contrast, lateralization of ongoing trains in which fresh noise tokens were used for each set of two alternating (left-leading/right-leading) binaural pairs followed the ITD of the first pair in each set, regardless of the ITD of the onset burst of the entire stimulus and even when the onset burst was removed by gradual gating. This clear lateralization of a long-duration stimulus with ambiguous interaural delay cues suggests precedence mechanisms that involve not only the interaural cues at the beginning of a sound, but also the pattern of cues within an ongoing sound.

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Citations

Apr 17, 2012·The Journal of the Acoustical Society of America·Matthew J GoupellRuth Y Litovsky
May 13, 2014·The Journal of the Acoustical Society of America·Richard L FreymanPatrick M Zurek
Jul 27, 2011·The Journal of the Acoustical Society of America·Eli Osman, Huan-yuan Tzuo
Jun 9, 2014·The Journal of the Acoustical Society of America·G Christopher Stecker, Jacqueline M Bibee
Feb 2, 2016·The Journal of the Acoustical Society of America·Darrin K ReedSteven van de Par
Jun 13, 2015·Journal of Neurophysiology·Janet L RuhlandTom C T Yin
Mar 3, 2018·The Journal of the Acoustical Society of America·G Christopher Stecker
Mar 3, 2018·The Journal of the Acoustical Society of America·G Christopher Stecker, Travis M Moore
Aug 3, 2017·The Journal of the Acoustical Society of America·Richard L Freyman, Patrick M Zurek
Aug 3, 2019·The Journal of the Acoustical Society of America·M Torben Pastore, Jonas Braasch
Mar 3, 2018·The Journal of the Acoustical Society of America·Richard L FreymanPatrick M Zurek

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