The nature and distribution of errors in sound localization by human listeners

被引:143
作者
Carlile, S
Leong, P
Hyams, S
机构
[1] UNIV SYDNEY,DEPT ELECT ENGN,SEDAL,SYDNEY,NSW 2006,AUSTRALIA
[2] UNIV SYDNEY,INST BIOMED RES,SYDNEY,NSW 2006,AUSTRALIA
基金
英国医学研究理事会; 澳大利亚研究理事会;
关键词
sound localization; spectral cue; pinna; binaural processing;
D O I
10.1016/S0378-5955(97)00161-5
中图分类号
R36 [病理学]; R76 [耳鼻咽喉科学];
学科分类号
100104 ; 100213 ;
摘要
Measurement of localization performance will reflect errors that relate to the sensory processing of the cues to sound location and the errors associated with the method by which the subject indicates the perceived location. This study has measured the ability of human subjects to localize a short noise burst presented in the free field with the subject indicating the perceived location by pointing their nose towards the source. Subjects were first trained using a closed loop training paradigm which involved instantaneous feedback as to the accuracy of head pointing which resulted in the reduction of residual localization errors and a rapid acquisition of the task by the subjects. Once trained, 19 subjects localized between 4 and 6 blocks of 76 target locations. The data were pooled and the distribution of errors associated with each target location was examined using spherical methods. Errors in the localization estimates for about one third of the locations were rotationally symmetrical about their mean but the remaining locations were best described by an elliptical distribution (Kent distributed). For about one half of the latter locations the orientations of the directions of the greatest variance of the distributions were not aligned with the azimuth and elevation coordinates used for describing the spatial location of the targets. The accuracy (systematic errors) and the distribution of the errors (variance) in localization for our population of subjects were also examined for each test location. The size of the data set and the methods of analysis provide very reliable measures of important baseline parameters of human auditory localization. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:179 / 196
页数:18
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