Subject: Binaural Temporal Window From: Bernhard Laback <bernhard.laback(at)OEAW.AC.AT> Date: Mon, 5 Jul 2004 18:23:27 +0200Dear list members, Several studies on sensitivity to interaural time delay (ITD) modeled ITD detection thresholds using the concept of a temporal window (e.g., Bernstein et al, 2001, JASA 109 or Akeroyd and Bernstein, 2001, JASA 110). These studies assume that the binaural system averages ITD information across a temporal window. My question: How can the concept of a temporal window account for the decrease in ITD thresholds with increasing signal duration (temporal integration effect)? If the temporal window as used in the studies cited above is the temporal integrator per se, no temporal integration effect could be expected. Averaging across the window would result in constant performance irrespective of signal duration. Is it conceivable, as an alternative explanation, that temporal integration occurs as a result of summation of information from successive short-time signal segments, similar to the "multiple looks" model proposed by Viemeister and Wakefield (1991, JASA 90)? According to such a model, a temporal window with a short time-constant extracts the short-time segments. Has anybody tested the validity of such a model combining the concept of a temporal window with the "multiple looks" approach with respect to ITD sensitivity? Any comments or suggestions are welcome. With best regards, Bernhard Laback -- *************************** Bernhard Laback, Ph.D. Acoustics Research Institute Austrian Academy of Sciences Reichsratsstrasse 17 A-1010 Wien Austria Tel.: 0043-1-4277-29514 Fax.: 0043-1-4277-9295 http://www.kfs.oeaw.ac.at/ ***************************