Spatial Speech-in-Noise Performance in Bimodal and Single-Sided Deaf Cochlear Implant Users
Spatial Speech-in-Noise Performance in Bimodal and Single-Sided Deaf Cochlear Implant Users
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DOI：
10.1177/2331216519858311
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发表时间：
2019-07-31
影响因子：
2.7
通讯作者：
Juergens, Tim
中科院分区：
文献类型：
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作者：
Williges, Ben;Wesarg, Thomas;Juergens, Tim
本研究比较了两个人工耳蜗植入（CI）患者组的空间语音噪声性能：双峰听众，他们使用助听器对侧支持他们受损的声学听力，以及对侧听力正常的听众，即，在植入前是单侧耳聋的人使用控制头部运动和模拟空间声学场景的实验室设置，测量来自前方、左侧或右侧的正面静止噪声中的语音接收阈值。空间释放掩蔽（SRM），然后从语音接收阈值提取单耳和双耳听。SRM被发现是显着低于双峰CI比CI单侧聋听众。在每个收听者组内，从单声道收听提取的SRM与从双耳收听提取的SRM没有不同。相比之下，听力正常的对照组在使用两只耳朵时的SRM比使用一只耳朵时有显着改善。CI组均未显示双耳总和效应，即在每个空间场景中使用两个设备而不是最佳单耳设备并未改善其性能。结果证实了两个CI患者组中的“用更好的耳朵听”策略，其中患者通过选择性地注意更好的一个而受益于使用两只耳朵/设备而不是一个。然而，哪一只耳朵更好，取决于空间场景和听力损失的个体配置。
This study compared spatial speech-in-noise performance in two cochlear implant (CI) patient groups: bimodal listeners, who use a hearing aid contralaterally to support their impaired acoustic hearing, and listeners with contralateral normal hearing, i.e., who were single-sided deaf before implantation. Using a laboratory setting that controls for head movements and that simulates spatial acoustic scenes, speech reception thresholds were measured for frontal speech-in-stationary noise from the front, the left, or the right side. Spatial release from masking (SRM) was then extracted from speech reception thresholds for monaural and binaural listening. SRM was found to be significantly lower in bimodal CI than in CI single-sided deaf listeners. Within each listener group, the SRM extracted from monaural listening did not differ from the SRM extracted from binaural listening. In contrast, a normal-hearing control group showed a significant improvement in SRM when using two ears in comparison to one. Neither CI group showed a binaural summation effect that is, their performance was not improved by using two devices instead of the best monaural device in each spatial scenario. The results confirm a "listening with the better ear" strategy in the two CI patient groups, where patients benefited from using two ears/devices instead of one by selectively attending to the better one. Which one is the better ear, however, depends on the spatial scenario and on the individual configuration of hearing loss.