Svirsky M A, Tobey E A
Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge 02139.
J Acoust Soc Am. 1991 Jun;89(6):2895-904. doi: 10.1121/1.400727.
Two experiments investigating the effects of auditory stimulation delivered via a Nucleus multichannel cochlear implant upon vowel production in adventitiously deafened adult speakers are reported. The first experiment contrasts vowel formant frequencies produced without auditory stimulation (implant processor OFF) to those produced with auditory stimulation (processor ON). Significant shifts in second formant frequencies were observed for intermediate vowels produced without auditory stimulation; however, no significant shifts were observed for the point vowels. Higher first formant frequencies occurred in five of eight vowels when the processor was turned ON versus OFF. A second experiment contrasted productions of the word "head" produced with a FULL map, OFF condition, and a SINGLE channel condition that restricted the amount of auditory information received by the subjects. This experiment revealed significant shifts in second formant frequencies between FULL map utterances and the other conditions. No significant differences in second formant frequencies were observed between SINGLE channel and OFF conditions. These data suggest auditory feedback information may be used to adjust the articulation of some speech sounds.
报告了两项实验，研究通过Nucleus多通道人工耳蜗传递的听觉刺激对后天性耳聋成年说话者元音发音的影响。第一个实验将无听觉刺激（植入处理器关闭）时产生的元音共振峰频率与有听觉刺激（处理器打开）时产生的元音共振峰频率进行对比。在无听觉刺激情况下产生的中间元音，观察到第二共振峰频率有显著变化；然而，在单元音中未观察到显著变化。当处理器打开与关闭时，八个元音中有五个出现了更高的第一共振峰频率。第二个实验对比了在全图、关闭状态和单通道状态下说出单词“head”的情况，单通道状态限制了受试者接收的听觉信息量。该实验揭示了全图发音与其他状态之间第二共振峰频率的显著变化。在单通道状态和关闭状态之间，未观察到第二共振峰频率的显著差异。这些数据表明，听觉反馈信息可能用于调整某些语音的发音。
