A comparative study of Interaural Time Delay estimation methods.
A comparative study of Interaural Time Delay estimation methods.
复制标题
DOI：
10.1121/1.4875714
复制
发表时间：
2014-06
期刊：
影响因子：
--
通讯作者：
B. Katz;M. Noisternig
中科院分区：
文献类型：
--
作者：
B. Katz;M. Noisternig
双耳时间延迟（ITD）是声源定位的重要双耳线索。ITD值的计算可以从测量的时域头部相关脉冲响应（HRIR）或从其频率变换头部相关传递函数（HRTF）获得。在当前的文献中存在许多方法，基于ITD作为声学线索的性质的各种定义和假设。这项工作提出了一个彻底的比较研究的变化程度之间的一些最常见的方法计算ITD从测量数据。32个不同的计算或变化进行了比较的HRTF测量的KEMAR人体模型和刚性球体上的水平面上的位置。具体而言，空间变化的方法进行了研究。包括这些差异的主要潜在原因的讨论，如存在多个峰值的对侧耳的HRIR的方位角附近的耳间轴，由于多径传播和头部/pinningshadowing。
The Interaural Time Delay (ITD) is an important binaural cue for sound source localization. Calculations of ITD values are obtained either from measured time domain Head-Related Impulse Responses (HRIRs) or from their frequency transform Head-Related Transfer Functions (HRTFs). Numerous methods exist in current literature, based on a variety of definitions and assumptions of the nature of the ITD as an acoustic cue. This work presents a thorough comparative study of the degree of variability between some of the most common methods for calculating the ITD from measured data. Thirty-two different calculations or variations are compared for positions on the horizontal plane for the HRTF measured on both a KEMAR mannequin and a rigid sphere. Specifically, the spatial variations of the methods are investigated. Included is a discussion of the primary potential causes of these differences, such as the existence of multiple peaks in the HRIR of the contra-lateral ear for azimuths near the inter-aural axis due to multipath propagation and head/pinnae shadowing.