Effects of electrode deactivation on speech recognition in multichannel cochlear implant recipients.
Effects of electrode deactivation on speech recognition in multichannel cochlear implant recipients.
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DOI：
10.1080/14670100.2017.1359457
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发表时间：
2017-11-01
影响因子：
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通讯作者：
Pfingst, Bryan E
中科院分区：
文献类型：
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作者：
Schvartz-Leyzac, Kara C;Zwolan, Teresa A;Pfingst, Bryan E
目的：本研究的目的是评估语音识别性能如何受到多通道人工耳蜗中关闭的有源电极数量的影响。最近的几项研究已经证明了基于人工耳蜗植入处理策略中的客观测量来停用刺激部位的积极效果。先前使用方差分析的研究表明，平均而言，人工耳蜗植入者的表现不会超过八个有源电极。我们假设，使用广义线性混合模型将允许更好地检查这个question.METHODS：七个舌后和成人人工耳蜗植入用户（8只耳朵）进行了测试，语音识别任务使用实验地图，其中包含8，12，16或20个有源电极。语音识别测试包括CUNY句子在语音形状的噪音，TIMIT句子在安静以及元音（CVC）和辅音（CV）刺激，在安静和信噪比为0和+10 dB。结果：语音识别阈值噪声（dB SNR）显着恶化约2 dB的平均有源电极的数量从20减少到8。 同样，句子识别分数在安静的显着下降了平均约12%.DISCUSSION/CONCLUSION：Cochanar植入受体可以利用和受益于使用超过8个频谱通道时，听复杂的句子或句子的背景噪音。当前研究的结果表明，当使用部位选择程序时，关闭刺激部位的保守方法是最好的。
OBJECTIVES: The objective of the current study is to evaluate how speech recognition performance is affected by the number of active electrodes that are turned off in multichannel cochlear implants. Several recent studies have demonstrated positive effects of deactivating stimulation sites based on an objective measure in cochlear implant processing strategies. Previous studies using an analysis of variance have shown that, on average, cochlear implant listeners' performance does not improve beyond eight active electrodes. We hypothesized that using a generalized linear mixed model would allow for better examination of this question.METHODS: Seven peri- and post-lingual adult cochlear implant users (eight ears) were tested on speech recognition tasks using experimental MAPs which contained either 8, 12, 16 or 20 active electrodes. Speech recognition tests included CUNY sentences in speech-shaped noise, TIMIT sentences in quiet as well as vowel (CVC) and consonant (CV) stimuli presented in quiet and in signal-to-noise ratios of 0 and +10 dB.RESULTS: The speech recognition threshold in noise (dB SNR) significantly worsened by approximately 2 dB on average as the number of active electrodes was decreased from 20 to 8. Likewise, sentence recognition scores in quiet significantly decreased by an average of approximately 12%.DISCUSSION/CONCLUSION: Cochlear implant recipients can utilize and benefit from using more than eight spectral channels when listening to complex sentences or sentences in background noise. The results of the current study suggest a conservative approach for turning off stimulation sites is best when using site-selection procedures.