Department of Communication Sciences and Disorders, The University of Texas at Austin, Austin, TX, USA.
Int J Audiol. 2021 Nov;60(11):875-884. doi: 10.1080/14992027.2020.1860260. Epub 2020 Dec 21.
Multiple studies have demonstrated binaural hearing deficits in the aging and those with hearing loss. Consequently, there is great interest in developing efficient clinical tests of binaural hearing acuity to improve diagnostic assessments and to assist clinicians when fitting binaural hearing aids and/or cochlear implants.
Two cortical measures of interaural phase difference sensitivity, the acoustic change complex (ACC) and interaural phase modulation following response (IPM-FR), were compared on three metrics using five different stimulus interaural phase differences (IPDs; 0°, ±22.5°, ±45°, ±67.5° and ±90°). These metrics were scalp topography, time-to-detect, and input-output characteristics.
Ten young, normal-hearing listeners.
Scalp topography qualitatively differed between ACC and IPM-FR. The IPM-FR demonstrated better time-to-detect performance on smaller (±22.5° and ±45°) but not larger (67.5°, and ±90°) IPDs. Input-output characteristics of each response were similar.
The IPM-FR may be a faster and more efficient tool for assessing neural sensitivity to subtle IPD changes. However, the ACC may be useful for research or clinical questions concerned with the topographic representation of binaural cues.
多项研究表明，双耳听力在衰老和听力损失人群中存在缺陷。因此，人们非常关注开发有效的双耳听力敏锐度临床测试，以改善诊断评估，并在为双耳助听器和/或人工耳蜗患者进行适配时为临床医生提供帮助。
使用五种不同的两耳间相位差（IPD；0°、±22.5°、±45°、±67.5°和±90°），对两个基于皮层的两耳间相位差敏感性的测量指标，声变复合（ACC）和两耳间相位调制跟随反应（IPM-FR），在三个指标上进行了比较。这些指标包括头皮地形图、检测时间和输入-输出特征。
10 名年轻、听力正常的听众。
ACC 和 IPM-FR 的头皮地形图存在定性差异。在较小的 IPD（±22.5°和±45°）上，IPM-FR 的检测时间性能更好，但在较大的 IPD（67.5°和±90°）上则不然。每个反应的输入-输出特征相似。
IPM-FR 可能是一种更快速、更有效的工具，用于评估对细微 IPD 变化的神经敏感性。然而，对于关注双耳线索的拓扑表示的研究或临床问题，ACC 可能是有用的。
