Adaptive dynamic range optimization for cochlear implants: A preliminary study
Adaptive dynamic range optimization for cochlear implants: A preliminary study
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DOI：
10.1097/00003446-200202001-00006
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发表时间：
2002-02-01
期刊：
影响因子：
3.7
通讯作者：
Macfarlane, D
中科院分区：
文献类型：
--
作者：
James, CJ;Blamey, PJ;Macfarlane, D
目标。本研究探讨了自适应动态范围优化(ADRO)对人工耳蜗术后受试者言语知觉的可接受性及其影响。ADRO是一种在每个频段连续调整增益以在输出动态范围内优化信号的预处理方案。设计：创建了带有和不带有ADRO处理的语音处理器程序。九名受试者在实验室接受了测试，并鼓励他们在日常听力环境中同时使用这两种程序。带回家的体验用偏好问卷进行评估。使用纽约城市大学(CUNY)句子、辅音-核心-辅音(CNC)单词和安静呈现的闭合集合受试者，比较了标准和ADRO程序的语音感知性能。使用了一系列呈现级别；从70至40分贝的声压级(未加权均方根)。在+15分贝和+10分贝的多人交谈中也出现了CUNY语句。结果：ADRO程序的言语知觉得分比标准程序有显著提高。在50分贝时，安静状态下开放式句子的平均分数提高了16%(p<；0.001)。受试者的平均单词分数在60分贝时提高了9.5%(p<；0.001)，而受试者的平均分数在40分贝时提高了20%。在任一噪声条件下，ADRO程序和标准程序的句子分数没有显著差异。在59%的患者中，ADRO是首选方案。9个受试者中有5个受试者表现出强烈的总体偏好，3个受试者表现出对ADRO的轻微偏好。结论：使用ADRO持续调整通道增益可以改善声音质量和提高言语感知能力。因此，ADRO是固定通道增益的一种可行的替代方案，并为人工耳蜗植入者提供了一种从其设备中获得更多好处的方法。
Objective. The present study investigated the acceptability and the effect of Adaptive dynamic range optimization (ADRO) on speech perception for cochlear implant subjects. ADRO is a preprocessing scheme that continuously adjusts the gain in each frequency band to optimize the signal in the output dynamic range.Design: Speech processor programs were created with and without ADRO processing. Nine subjects were tested in the laboratory and encouraged to use both programs in everyday listening situations. Take-home experience was assessed with preference questionnaires. Speech perception performance was compared for the standard and ADRO programs using City University of New York (CUNY) sentences, consonant-nucleus-consonant (CNC) words, and closed set spondees presented in quiet. A range of presentation levels were used; from 70 to 40 dB sound pressure level (unweighted RMS). CUNY sentences were also presented in multi-talker babble with +15 dB and +10 dB signal to noise ratios.Results: There was a significant improvement in speech perception scores with the ADRO programs compared with the standard. At 50 dB, the mean open set sentence scores in quiet improved by 16% (p < 0.001). There was an improvement in mean word score for CNC words presented at 60 dB of 9.5% (p < 0.001) and a 20% improvement in mean score for spondees presented at 40 dB. There was no significant difference in sentence scores between the ADRO and the standard program for sentences presented in either noise condition. ADRO was the preferred program in 59%. of listening situations, with five out of nine subjects indicating a strong overall preference and three subjects indicating a slight preference for ADRO.Conclusions: Continual adjustment of channel gains using ADRO provided improved sound quality and improved speech perception performance. Therefore, ADRO is a viable alternative to fixed channel gain and offers a means for cochlear implantees to gain more benefit from their devices.