Combining acoustic and electrical speech processing: Iowa/nucleus hybrid implant
Combining acoustic and electrical speech processing: Iowa/nucleus hybrid implant
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DOI：
10.1080/00016480410016423
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发表时间：
2004-05-01
影响因子：
1.4
通讯作者：
Turner, C
中科院分区：
文献类型：
--
作者：
Gantz, BJ;Turner, C
目标——在本文中，我们测试了将高频声音的电刺激与同一只耳朵的低频信息的声学听觉相结合的概念。此外，我们还测试了当电极插入内耳10毫米时是否可以保留残余听力，以及电刺激部位是否会影响言语感知。 材料与方法——招募了9名患有严重高频听力障碍的语后成人参与这项研究。采用单受试者临床试验设计。为此临床试验设计了独特的六通道人工耳蜗。基于 Nucleus CI-24 多通道植入物，耳蜗内电极的长度为 6 或 10 毫米。在仅录制声音的情况下，使用单音节单词理解和辅音识别来评估语音感知的变化。随访时间> 12 个月。结果-所有九名受试者的听觉均得以保留。植入后所有受试者的术前单音节单词和句子评分均未变化。使用 10 分钟电极后，辅音识别能力提高了 30-40%。使用植入物和双耳助听器，10 分钟电极受试者能够理解 83-90% 的单音节单词。与仅使用助听器获得的术前分数相比，分数增加了一倍多。 结论：人类汽车有能力整合声学和高频电处理语音信息。放置 10 毫米短电极似乎不会损害残余低频内耳毛细胞功能、干扰正常耳蜗振动的微机械或降低残余言语感知。语音识别能力的提高主要是由于对高频辅音语音提示的感知能力增强。这种设备可以为那些患有严重高频听力损失的人提供语音理解方面的实质性好处，同时仍然保持残余低频听觉的好处。电极的位置和耳蜗内频率信息的位置被证明是此类设备成功的重要因素。
Objectives-In this paper we test the concept of combining electrical stimulation for high-frequency sound with acoustic hearing for low-frequency information in the same ear. In addition, we test whether residual hearing can be preserved when an electrode is placed up to 10 mm into the inner ear, and whether the site of electrical stimulation influences speech perception.Material and Methods-Nine post-lingual adults with severe high-frequency hearing impairment were recruited to participate in the study. A single-subject clinical trial design was employed. A unique six-channel cochlear implant was designed for this clinical trial. The intracochlear electrodes were either 6 or 10 mm in length based on a Nucleus CI-24 multichannel implant. Monosyllabic word understanding and consonant identification in a recorded sound-only condition were used to assess changes in speech perception. Follow-up was > 12 months.Results-Acoustic hearing was preserved in all nine subjects. Preoperative monosyllabic word and sentence scores were unchanged in all subjects following implantation. A 30-40% improvement in consonant recognition occurred with the 10-min electrode. The 10-min electrode subjects were able to understand 83-90% of the monosyllabic words using the implant plus binaural hearing aids. Scores were more than doubled when compared to preoperative scores achieved with hearing aids only.Conclusions-The human car has the capability to integrate both acoustic and high-frequency electrically processed speech information. Placement of a short 10-mm electrode does not appear to damage residual low-frequency inner ear hair cell function, interfere with the micro-mechanics of normal cochlear vibration or decrease residual speech perception. The improvement in speech recognition was due primarily to the increased perception of higher-frequency consonantal speech cues. Such a device can provide a substantial benefit in terms of speech understanding to those with severe high-frequency hearing loss, while still maintaining the benefits of the residual lower-frequency acoustic hearing. The position of the electrode and the site of frequency information within the cochlea are shown to be important factors in the success of such a device.