Speech perception with the Vienna extra-cochlear single-channel implant: a comparison of two approaches to speech coding.
Speech perception with the Vienna extra-cochlear single-channel implant: a comparison of two approaches to speech coding.
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维也纳耳蜗外单通道植入物的语音感知：两种语音编码方法的比较。
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
V. Ball
中科院分区：
文献类型：
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作者：
S. Rosen;V. Ball
虽然人们普遍认为单通道电刺激可以显着提高患者的语音感知能力，但围绕语音处理方案的选择仍然存在很大争议。在相同的患者中，我们比较了两种不同的方法：（1）EPI组的语音模式提取技术，伦敦（Fourcin等人，BritishJournalofAudiology，1979，13，85 -107），其中语音基频被提取并以适当的方式呈现;（2）Hochmair和Hochmair-Desoyer的模拟“全语音”方法（Annals of the纽约Academy of Sciences，1983，405，268-279）of维也纳，其中麦克风感测的声信号在被提供给电极之前被频率均衡和幅度压缩。使用“全语音”编码方案（他们每天使用），所有三名患者在使用该设备时唇读都有所改善。没有一个病人能在不读唇的情况下听懂别人的话。显示出合理的区分浊音对比度和音高轮廓的能力。一名患者能够在某些情况下检测并适当利用无摩擦摩擦的存在。在自然语音的频谱特征的敏感性很小，虽然两个病人可以检测到合成元音的第一共振峰的频率变化。基本频率的呈现通常只会导致与之相关的特征（发声和语调）的感知改善。只有一名患者始终表现出编码比单独使用基本原理更有优势（并非在所有测试中）。
Although it is generally accepted that single-channel electrical stimulation can significantly improve a deafened patient's speech perceptual ability, there is still much controversy surrounding the choice of speech processing schemes. We have compared, in the same patients, two different approaches: (1) The speech pattern extraction technique of the EPI group, London (Fourcin et al., British Journal of Audiology, 1979,13,85-107) in which voice fundamental frequency is extracted and presented in an appropriate way, and (2) The analogue 'whole speech' approach of Hochmair and Hochmair-Desoyer (Annals of the New York Academy of Sciences, 1983, 405, 268-279) of Vienna, in which the microphone-sensed acoustic signal is frequency-equalized and amplitude-compressed before being presented to the electrode. With the 'whole-speech' coding scheme (which they used daily), all three patients showed an improvement in lipreading when they used the device. No patient was able to understand speech without lipreading. Reasonable ability to distinguish voicing contrasts and voice pitch contours was displayed. One patient was able to detect and make appropriate use of the presence of voiceless frication in certain situations. Little sensitivity to spectral features in natural speech was noted, although two patients could detect changes in the frequency of the first formant of synthesised vowels. Presentation of the fundamental frequency only generally led to improved perception of features associated with it (voicing and intonation). Only one patient consistently showed any advantage (and that not in all tests) of coding more than the fundamental alone.