Humanski R A, Butler R A
Department of Behavioral Sciences, University of Chicago, Illinois 60637.
J Acoust Soc Am. 1988 Jun;83(6):2300-10. doi: 10.1121/1.396361.
Eight listeners were required to locate a train of 4.5-kHz high-pass noise bursts emanating from loudspeakers positioned +/- 30, +/- 20, +/- 10, and 0 deg re: interaural axis. The vertical array of loudspeakers was placed at 45, 90, and 135 deg left of midline. The various experimental conditions incorporated binaural and monaural listening with the latter utilizing the ear nearest or ear farthest from the sound source. While performance excelled when listening with only the near ear, the contribution of the far ear was statistically significant when compared to localization performance when both ears were occluded. Based on head related transfer functions for stimuli whose bandwidth was 1.0 kHz, four spectral cues were selected as candidates for influencing location judgments. Two of them associated relative changes in energy across center frequencies (CFs) with vertical source positions. The other two associated an absolute minimum (maximum) energy for specific CFs with a vertical source position. All but one cue when measured for the near ear could account for localization proficiency. On the other hand, when listening with the far ear, maximum energy at a specific CF outperformed the remaining cues in accounting for localization proficiency.
八名听众需要定位一系列从位于与双耳轴呈+/- 30度、+/- 20度、+/- 10度和0度的扬声器发出的4.5千赫高通噪声脉冲串。扬声器的垂直阵列放置在中线左侧45度、90度和135度处。各种实验条件包括双耳聆听和单耳聆听，后者使用离声源最近或最远的耳朵。虽然仅用近耳聆听时表现出色，但与双耳被堵塞时的定位表现相比，远耳的贡献在统计学上具有显著意义。基于带宽为1.0千赫的刺激的头部相关传递函数，选择了四个频谱线索作为影响位置判断的候选线索。其中两个将中心频率（CFs）之间能量的相对变化与垂直声源位置相关联。另外两个将特定CFs的绝对最小（最大）能量与垂直声源位置相关联。除了一个线索外，当测量近耳时，所有线索都可以解释定位能力。另一方面，当用远耳聆听时，特定CFs处的最大能量在解释定位能力方面优于其余线索。
