Processing F0 with cochlear implants: Modulation frequency discrimination and speech intonation recognition
Processing F0 with cochlear implants: Modulation frequency discrimination and speech intonation recognition
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DOI：
10.1016/j.heares.2007.11.004
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发表时间：
2008-01-01
期刊：
影响因子：
2.8
通讯作者：
Peng, Shu-Chen
中科院分区：
文献类型：
--
作者：
Chatterjee, Monita;Peng, Shu-Chen
使用心理物理学任务和语音语调识别任务来测量人工耳蜗 (CI) 听者的基频 (F0) 处理。使用自适应、3 间隔、强制选择范例来测量听众的调制频率辨别韦伯分数：通过自定义研究界面呈现刺激。在语音语调识别任务中，要求听众指出当通过听众的日常语音处理器在自由场中呈现重新合成的双音节单词时，该双音节单词是类似问题的还是类似陈述的。重新合成的标记被系统地操纵为具有不同的初始 F0 来代表男性和女性的声音，以及不同的 F0 轮廓（即下降、平坦和上升）。尽管 CI 听众在这两项任务中的表现表现出相当大的差异，但在 CI 听众对心理物理任务中调制频率的敏感度与他们在语调识别中的表现之间观察到显着的相关性。与他们对时间线索的更大依赖相一致，CI 听众在语调识别任务中的表现在较高的初始 F0 刺激下明显比在较低的初始 F0 刺激下差。正常听力听众在降低频谱分辨率的情况下进行噪声带声码 CI 模拟时也获得了类似的结果。 (C) 2007 Elsevier B.V. 保留所有权利。
Fundamental frequency (F0) processing by cochlear implant (CI) listeners was measured using a psychophysical task and a speech intonation recognition task. Listeners' Weber fractions for modulation frequency discrimination were measured using an adaptive, 3-interval, forced-choice paradigm: stimuli were presented through a custom research interface. In the speech intonation recognition task, listeners were asked to indicate whether resynthesized bisyllabic words, when presented in the free field through the listeners' everyday speech processor, were question-like or statement-like. The resynthesized tokens were systematically manipulated to have different initial-F0s to represent male vs. female voices, and different F0 contours (i.e. falling, flat, and rising) Although the CI listeners showed considerable variation in performance on both tasks, significant correlations were observed between the CI listeners' sensitivity to modulation frequency in the psychophysical task and their performance in intonation recognition. Consistent with their greater reliance on temporal cues, the CI listeners' performance in the intonation recognition task was significantly poorer with the higher initial-F0 stimuli than with the lower initial-F0 stimuli. Similar results were obtained with normal hearing listeners attending to noiseband-vocoded CI simulations with reduced spectral resolution. (C) 2007 Elsevier B.V. All rights reserved.