比较单侧、双侧、单侧聋和双模式人工耳蜗使用者的声音定位与噪声下言语识别

文献信息

中文摘要

人工耳蜗使用者体验空间听觉的准确性和敏锐度不如典型听力者。空间听觉的两项标准测量是声音定位误差和空间分离噪声下的言语接受阈值（SRTs）。虽然声音定位需要复杂的设置，但SRTs可以用较少的扬声器和较短的测试时间测量。如果能测量声音定位误差与SRTs之间的预测关系，那么人工耳蜗使用者的空间听觉能力可以通过测量其中一项任务来快速评估。为了测试这一点，招募了12名双侧、10名单侧聋、6名双模式和5名单侧植入的听者。一般来说，双侧使用者的定位误差最小，在共置和空间分离条件下的SRTs改善最大，而单侧使用者的定位误差最大，SRTs最差。当排除单侧听者时，定位误差与空间分离和共置SRTs之间的差异显著相关。声音定位误差与原始SRT分数之间没有关系。单侧听者的空间听觉将受益于接受第二侧植入，许多双模式使用者也可能从这种干预中获益。

英文摘要

Cochlear implant users do not experience spatial hearing with the same accuracy or acuity as typical hearing listeners. Two standard measures of spatial hearing are sound localization error and speech reception thresholds (SRTs) in spatially separated noise. While sound localization requires a complicated setup, SRTs may be measured with fewer loudspeakers and less testing time. If a predictive relationship between sound localization error and SRTs can be measured, then the spatial hearing abilities of cochlear implant users may be quickly assessed by measuring one task or the other. To test this, 12 bilateral, ten single-sided deaf, six bimodal, and five unilaterally implanted listeners were recruited. In general, bilateral users had the smallest localization error and greatest improvement in SRTs between collocated and spatially separated conditions, while unilateral users had the largest localization error and worst SRTs. When unilateral listeners were excluded, localization error was significantly correlated with the difference between spatially separated and collocated SRTs. There was no relationship between sound localization error and raw SRT scores. The spatial hearing of unilateral listeners would benefit from receiving a second implant, and many bimodal users would likely experience a benefit from this intervention as well.