Department of Speech and Hearing Sciences, University of Washington, 1417 NE 42nd Street, Seattle, Washington 98105, USA.
J Acoust Soc Am. 2010 Jul;128(1):332-41. doi: 10.1121/1.3436540.
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 [Stecker, G. C., and Hafter, E. R. (2009), J. Acoust. Soc. Am. 125, 3914-3924].
时间加权函数（TWFs），定量测量了对短暂刺激期间的两耳时间差（ITD）和两耳强度差（ILD）的敏感性，使用以 4 kHz 为中心的 16 个 Gabor 点击组成的火车，在 6 个正常听力受试者中进行测量，这些点击以 4 种速率呈现（点击间间隔（ICI）为 10、5、2.5 和 1.25 ms）。在单独的条件下，随机 ITD 或 ILD 独立施加于火车中的每个点击。受试者的任务是辨别点击火车的侧方位置（“左”或“右”）。然后使用接收者操作特性（ROC）分析来根据每个点击的单独 ITD 或 ILD 来量化每个点击的有效性或“权重”。尽管存在个体差异，但起始线索似乎在高速率下占主导地位。在 1.25 ms ICI 时，起始主导作用对于 ITD 和 ILD 都很明显，在 2.5 ms ICI 时对于 ITD 也是如此，但在 5 或 10 ms ICI 时对于这两种线索都不明显。对于 ITD，起始主导作用平均大于 ILD，尽管两种线索的 TWFs 在质量上相似。没有发现对迟到达 ILD 的“加权加重”的证据[Stecker，GC 和 Hafter，ER（2009），J. Acoust. Soc. Am. 125，3914-3924]。
