Comparison of speech recognition and localization performance in bilateral and unilateral cohlear implant users matched on duration of deafness and age at implantation
Comparison of speech recognition and localization performance in bilateral and unilateral cohlear implant users matched on duration of deafness and age at implantation
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DOI：
10.1097/aud.0b013e318167b870
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发表时间：
2008-06-01
期刊：
影响因子：
3.7
通讯作者：
Noble, William
中科院分区：
文献类型：
--
作者：
Dunn, Camille C.;Tyler, Richard S.;Noble, William
目的：本调查的目的是比较语音识别和定位性能的受试者谁戴双侧人工耳蜗植入体（CICI）与受试者谁戴单侧人工耳蜗植入体（真正CI-omly）。设计：共有73名受试者参加了这项研究。具体而言，在73名受试者中，64名（32名CICI和32名真正的CI-omly）参与了单词识别测试; 66名（33名CICI和33名真正的CI-only）参与了句子识别测试; 24名（12名CICI和12名真正的CI-omly）参与了本地化测试。由于时间限制，并非所有受试者都完成了所有测试。参与言语感知测试的CICI和真正的CI-完全听力者的平均植入年龄分别为54岁和55岁，两组听力者的平均耳聋持续时间为8年。参与定位测试的CICI和真正的CI-完全听众的平均植入年龄分别为54岁和53岁，CICI听众的平均耳聋持续时间为10年，真正的CI-完全听众的平均耳聋持续时间为11年。所有的言语刺激都从正面呈现。日常声音定位的测试设置包括一个八扬声器阵列跨越，一个弧约108度在额水平plane.Results：平均组的结果被转化为artifalized反正弦单位分数。CICI评分和真正的CI评分之间的性能比较显示，两组之间存在显着差异，CICI组的句子得分高出19%，单词得分高出24%。此外，当两个人工耳蜗植入物一起使用时（CICI），而不是单独使用人工耳蜗植入物时，结果表明，对于CICI受试者，双耳对句子和单词的总和效应显著。这项研究的平均组结果显示，使用两个人工耳蜗的听众在安静和定位时对单词和句子的益处明显大于只使用人工耳蜗的听众。一个人工耳蜗对这一结果的一种解释可能是，来自两侧的相同信息被结合在一起，这导致了对刺激的更好的表示。第二种解释可能是CICI允许从两个受损的外周听觉系统转移不同的神经信息，导致不同的信息模式集中汇总，从而增强言语感知。未来的研究将使用类似的方法，以确定是否有两个人工耳蜗植入的听众能够比有一个人工耳蜗植入的听众在噪音中表现更好。
Objectives: The purpose of this investigation was to compare speech recognition and localization performance of subjects who wear bilateral cochlear implants (CICI) with subjects who wear a unilateral cochlear implant (true CI-omly).Design: A total of 73 subjects participated in this study. Specifically, of the 73 subjects, 64 (32 CICI and 32 true CI-omly) participated in the word recognition testing; 66 (33 CICI and 33 true CI-only) participated in the sentence recognition testing; and 24 (12 CICI and 12 true CI-omly) participated in the localization testing. Because of time constraints not all subjects completed all testing. The average age at implantation for the CICI and true CI-omly listeners who participated in the speech perception testing was 54 and 55 yrs, respectively, and the average duration of deafness was 8 yrs for both groups of listeners. The average age at implantation for the CICI and true CI-omly listeners who participated in the localization testing was 54 and 53 yrs, respectively, and the average duration of deafness was 10 yrs for the CICI listeners and 11 yrs for the true CI-omly listeners. All speech stimuli were presented from the front. The test setup for everyday-sound localization comprised an eight-speaker array spanning, an arc of approximately 108 degrees in the frontal horizontal plane.Results: Average group results were transformed to Rationalized Arcsine Unit scores. A comparison in performance between the CICI score and the true CI-only score in quiet revealed a significant difference between the two groups with the CICI group scoring 19% higher for sentences and 24% higher for words. In addition, when both cochlear implants were used together (CICI) rather than when either cochlear implant was used alone (right CI or left CI) for the CICI listeners, results indicated a significant binaural summation effect for sentences and words.Conclusion: The average group results in this study showed significantly greater benefit on words and sentences in quiet and localization for listeners using two cochlear implants over those using only one cochlear implant. One explanation of this result might be that the same information from both sides are combined, which results in a better representation of the stimulus. A second explanation might be that CICI allow for the transfer of different neural information from two damaged peripheral auditory systems leading to different patterns of information summating centrally resulting in enhanced speech perception. A future study using similar methodology to the current one will have to be conducted to determine if listeners with two cochlear implants are able to perform better than listeners with one cochlear implant in noise.