TY - JOUR
T1 - Temporal weighting of interaural time and level differences in high-rate click trains
AU - Brown, Andrew D.
AU - Stecker, G. Christopher
N1 - Funding Information:
The authors thank Michael Akeroyd and two anonymous reviewers for helpful comments on an earlier version of this manuscript, and Shiboney Dumo for help with data collection. This work was supported by NIDCD Grant Nos. R03-DC009482 and T32-DC000033. 1
PY - 2010/7
Y1 - 2010/7
N2 - Temporal weighting functions (TWFs), quantifying sensitivity to interaural time differences (ITD) and interaural level differences (ILD) over the duration of brief stimuli, were measured in 6 normal hearing subjects using trains of 16 Gabor clicks centered at 4 kHz presented dichotically at 4 rates [inter-click intervals (ICI) of 10, 5, 2.5, and 1.25 ms]. Random ITD or ILD were imposed independently on each click in the train in separate conditions. The subject's task was to discriminate the lateral position of the click train ("left" or "right"). Receiver operating characteristic (ROC) analysis was then used to quantify the effectiveness or "weight" of each click according to individual click ITD or ILD. Although individual differences were evident, onset cues appeared to dominate at high rates. Onset dominance was apparent for both ITD and ILD at 1.25 ms ICI and for ITD at 2.5 ms ICI, but for neither cue at 5 or 10 ms ICI. Onset dominance was greater on average for ITD than ILD, although TWFs were qualitatively similar for the two cues. No evidence was found for "upweighting" of late-arriving ILD.
AB - Temporal weighting functions (TWFs), quantifying sensitivity to interaural time differences (ITD) and interaural level differences (ILD) over the duration of brief stimuli, were measured in 6 normal hearing subjects using trains of 16 Gabor clicks centered at 4 kHz presented dichotically at 4 rates [inter-click intervals (ICI) of 10, 5, 2.5, and 1.25 ms]. Random ITD or ILD were imposed independently on each click in the train in separate conditions. The subject's task was to discriminate the lateral position of the click train ("left" or "right"). Receiver operating characteristic (ROC) analysis was then used to quantify the effectiveness or "weight" of each click according to individual click ITD or ILD. Although individual differences were evident, onset cues appeared to dominate at high rates. Onset dominance was apparent for both ITD and ILD at 1.25 ms ICI and for ITD at 2.5 ms ICI, but for neither cue at 5 or 10 ms ICI. Onset dominance was greater on average for ITD than ILD, although TWFs were qualitatively similar for the two cues. No evidence was found for "upweighting" of late-arriving ILD.
UR - http://www.scopus.com/inward/record.url?scp=77955216157&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955216157&partnerID=8YFLogxK
U2 - 10.1121/1.3436540
DO - 10.1121/1.3436540
M3 - Article
C2 - 20649228
AN - SCOPUS:77955216157
SN - 0001-4966
VL - 128
SP - 332
EP - 341
JO - Journal of the Acoustical Society of America
JF - Journal of the Acoustical Society of America
IS - 1
ER -