Effects of minimum stimulation settings for the Med El Tempo+ speech processor on speech understanding
Effects of minimum stimulation settings for the Med El Tempo+ speech processor on speech understanding
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DOI：
10.1097/00003446-200508001-00002
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发表时间：
2005-08-01
期刊：
影响因子：
3.7
通讯作者：
Dorman, MF
中科院分区：
文献类型：
--
作者：
Spahr, AJ;Dorman, MF
目的：本研究的目的是评估最小刺激水平设置的变化对使用 Med El Tempo+ 语音处理器的成人人工耳蜗植入者的言语理解的影响。设计：15 名患者作为听众。测试材料包括在噪声中以会话级别呈现的句子（74 dB SPL，+10 dB 信噪比）、在安静背景中以柔和级别呈现的句子（54 dB SPL）、“vCv”环境中的辅音（74 dB SPL re：元音峰值）以及“bVt”环境中的合成元音（54 dB SPL re：元音峰值）。患者的语音处理器被编程为最小刺激水平设置为行为阈值、最舒适响度的 10% 和 0 muA。 结果：对于任何测试材料，在行为阈值条件下实现的语音理解水平与在最舒适响度的 10% 或 0 muA 条件下实现的语音理解水平没有显着差异。 15 名患者中只有 2 名患者在多次测试中表现出 0 mu A 条件和行为阈值条件之间的表现差异大于 10 个百分点。结论：我们的结果表明，在言语理解方面，将最小刺激水平设置为低于行为阈值不会产生严重后果。在初始设备适配过程中，将阈值设置为 MCL 的 10% 或 0 mu A 所节省的时间可能特别有用。
Objective: The aim of this study was to assess the effects of variations in the settings for minimum stimulation levels on speech understanding for adult cochlear implant recipients using the Med El Tempo+ speech processor.Design: Fifteen patients served as listeners. The test material included sentences presented at a conversational level in noise (74 dB SPL at + 10 dB signal-to-noise ratio), sentences presented at a soft level in a quiet background (54 dB SPL), consonants in "vCv" environment (74 dB SPL re: vowel peaks), and synthetic vowels in "bVt" environment (54 dB SPL re: vowel peaks). The patients' speech processors were programmed with minimum stimulation levels set to behavioral threshold, set to 10% of most comfortable loudness, and set to 0 mu A.Results: The level of speech understanding achieved in the behavioral threshold condition was not significantly different from that achieved in either the 10% of most comfortable loudness or 0 mu A conditions for any test material. Only 2 of the 15 patients demonstrated performance differences of greater than 10 percentage points between the 0 mu A condition and the behavioral threshold condition on more than a single test.Conclusions: Our results demonstrate that there are no grievous consequences, in terms of speech understanding, for setting minimum stimulation levels below behavioral thresholds. The time savings from setting thresholds to 10% of MCL or 0 mu A may be especially useful during the initial device fitting.