Understanding the Process of Integration in Binaural Cochlear Implant Configurations.

IF 2.6 2区 医学 Q1 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY
John B Muegge, Bob McMurray
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引用次数: 0

Abstract

Objectives: Cochlear implant (CI) users with access to hearing in both ears (binaural configurations) tend to perform better in speech perception tasks than users with a single-hearing ear alone. This benefit derives from several sources, but one central contributor may be that binaural hearing allows listeners to integrate content across ears. A substantial literature demonstrates that binaural integration differs between CI users and normal hearing controls. However, there are still questions about the underlying process of this integration. Here, we test both normal-hearing listeners and CI users to examine this process.

Design: Twenty-three CI users (7 bimodal, 7 bilateral, and 9 single sided deafness CI users) and 28 age-matched normal-hearing listeners completed a dichotic listening task, in which first and second formants from one of four vowels were played to each ear in various configurations: with both formants heard diotically, with one formant heard diotically, or with one formant heard in one ear and the second formant heard in the other (dichotically). Each formant heard alone should provide minimal information for identifying the vowel. Thus, listeners must successfully integrate information from both ears if they are to show good performance in the dichotic condition.

Results: Normal-hearing listeners showed no noticeable difference in performance when formants were heard diotically or dichotically. CI users showed significantly reduced performance in the dichotic condition relative to when formants were heard diotically. A deeper examination of individual participants suggests that CI users show important variation in their integration process.

Conclusions: Using a dichotic listening task we provide evidence that while normal-hearing listeners successfully integrate content dichotically, CI users show remarkable differences in how they approach integration. This opens further questions regarding the circumstances in which listeners display different integration profiles and has implications for understanding variation in real-world performance outcomes.

了解双耳人工耳蜗构型的整合过程。
目的:双耳耳蜗植入(CI)的使用者在语音感知任务中比单耳听力的使用者表现更好。这种好处有几个来源,但一个主要的原因可能是双耳听力允许听者跨耳整合内容。大量文献表明,双耳整合在CI使用者和正常听力控制者之间存在差异。然而,关于这种集成的基本过程仍然存在一些问题。在这里,我们测试了听力正常的听众和CI用户来检查这个过程。设计:23名耳聋用户(7名双峰耳聋用户,7名双侧耳聋用户,9名单侧耳聋用户)和28名年龄匹配的正常听力听者完成了一项双听任务,其中四个元音中的一个的第一和第二个共振峰以不同的配置播放给每只耳朵:两个共振峰都是双听的,一个共振峰是双听的,或者一只耳朵听到一个共振峰,另一只耳朵听到第二个共振峰(双听)。每个单独听到的构音应该提供识别元音的最小信息。因此,听众必须成功地整合来自两只耳朵的信息,如果他们要在二分条件下表现良好。结果:听力正常的听者在双音或双音听音时表现无明显差异。相对于听者是听者的情况,CI使用者在听者是听者的情况下表现出明显的下降。对个体参与者的深入研究表明,CI用户在他们的集成过程中表现出重要的变化。结论:通过一个二分聆听任务,我们提供了证据,证明听力正常的听众可以成功地二分整合内容,而CI用户在如何进行整合方面表现出显著的差异。这就进一步提出了有关侦听器显示不同集成配置文件的情况的问题,并对理解实际性能结果的变化具有影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ear and Hearing
Ear and Hearing 医学-耳鼻喉科学
CiteScore
5.90
自引率
10.80%
发文量
207
审稿时长
6-12 weeks
期刊介绍: From the basic science of hearing and balance disorders to auditory electrophysiology to amplification and the psychological factors of hearing loss, Ear and Hearing covers all aspects of auditory and vestibular disorders. This multidisciplinary journal consolidates the various factors that contribute to identification, remediation, and audiologic and vestibular rehabilitation. It is the one journal that serves the diverse interest of all members of this professional community -- otologists, audiologists, educators, and to those involved in the design, manufacture, and distribution of amplification systems. The original articles published in the journal focus on assessment, diagnosis, and management of auditory and vestibular disorders.
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