有或无对称低频听觉的听力保留患者的声源定位
Sound source localization by hearing preservation patients with and without symmetrical low-frequency acoustic hearing.
作者信息
Loiselle Louise H, Dorman Michael F, Yost William A, Gifford René H
机构信息
Arizona State University, Tempe, Ariz., USA.
出版信息
Audiol Neurootol. 2015;20(3):166-71. doi: 10.1159/000367883. Epub 2015 Apr 1.
Abstract
The aim of this article was to study sound source localization by cochlear implant (CI) listeners with low-frequency (LF) acoustic hearing in both the operated ear and in the contralateral ear. Eight CI listeners had symmetrical LF acoustic hearing and 4 had asymmetrical LF acoustic hearing. The effects of two variables were assessed: (i) the symmetry of the LF thresholds in the two ears and (ii) the presence/absence of bilateral acoustic amplification. Stimuli consisted of low-pass, high-pass, and wideband noise bursts presented in the frontal horizontal plane. Localization accuracy was 23° of error for the symmetrical listeners and 76° of error for the asymmetrical listeners. The presence of a unilateral CI used in conjunction with bilateral LF acoustic hearing does not impair sound source localization accuracy, but amplification for acoustic hearing can be detrimental to sound source localization accuracy.
摘要
本文旨在研究在手术耳和对侧耳均具有低频（LF）听觉的人工耳蜗（CI）使用者对声源的定位情况。8名CI使用者具有对称的低频听觉，4名具有不对称的低频听觉。评估了两个变量的影响：（i）双耳低频阈值的对称性；（ii）双侧是否存在声学放大。刺激声由呈现于额部水平面的低通、高通和宽带噪声脉冲串组成。对称组使用者的定位误差为23°，不对称组为76°。单侧CI与双侧低频听觉联合使用不会损害声源定位准确性，但声学听觉的放大可能会对声源定位准确性产生不利影响。
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