2-DIMENSIONAL SOUND LOCALIZATION BY HUMAN LISTENERS
2-DIMENSIONAL SOUND LOCALIZATION BY HUMAN LISTENERS
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DOI：
10.1121/1.399186
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发表时间：
1990-05-01
影响因子：
2.4
通讯作者：
MIDDLEBROOKS, JC
中科院分区：
文献类型：
--
作者：
MAKOUS, JC;MIDDLEBROOKS, JC
这项研究测量了受试者定位水平和垂直位置变化的宽带声源的能力。在自由场中呈现简短（150 毫秒）的声音，受试者通过转身面对声源来报告明显的刺激位置；头部方向通过电磁测量。还测试了连续声音的定位，以估计头部定向运动动作中的误差。对于在受试者面前呈现的简短声音，定位性能非常出色。受试者之间的平均最小误差约为 2°。和3.5度。分别在水平和垂直维度上。对于更外围的刺激位置，误差的大小增加到约 20° 的最大值。对于位于额叶中线或附近的刺激，水平方向的定位性能比垂直方向的定位性能更好，但对于位于更外围的大多数刺激来说，情况恰恰相反。 6% 的试验出现前后混淆；这些反应的特征表明，受试者主要从耳间差异线索中获取水平定位信息。通过头部定向技术获得的普遍高水平的性能证明了其在声音定位的持续研究中的实用性。
This study measured the ability of subjects to localize broadband sound sources that varied in both horizontal and vertical location. Brief (150 ms) sounds were presented in a free field, and subjects reported the apparent stimulus location by turning to face the sound source; head orientation was measured electromagnetically. Localization of continuous sounds also was tested to estimate errors in the motor act of orienting with the head. Localization performance was excellent for brief sounds presented in front of the subjct. The smallest errors, averaged across subjects were about 2.degree. and 3.5.degree. in the horizontal and vertical dimensions, respectively. The sizes of errors increased, for more peripheral stimulus locations, to maxima of about 20.degree.. Localization performance was better in the horizontal than in the vertical dimension for stimuli located on or near the frontal midline, but the opposite was true for most stimuli located further peripheral. Front/back confusions occurred in 6% of trials; the characteristics of those responses suggest that subjects derived horizontal localization information principally from interaural difference cues. The generally high level of performance obtained with the head orientation technique argues for its utility in continuing studies of sound localization.