Lane H, Wozniak J, Matthies M, Svirsky M, Perkell J
Massachusetts Institute of Technology, Research Laboratory of Electronics, Cambridge 02139, USA.
J Acoust Soc Am. 1995 Dec;98(6):3096-106. doi: 10.1121/1.413798.
Voice-onset time (VOT) was measured in plosive-initial syllables uttered by five cochlear implant users prior to and repeatedly at intervals after activation of their speech processors. In "short-term" experiments, the elicitation set was read after the subject's processor has been off for 24 h, then turned on them off again. Four out of five implant users increased voiceless and/or voiced VOTc (VOT corrected for changes in syllable duration) from preimplant baselines to final recordings made 1-3 years later. Measured acoustic correlates of speech "posture" (average SPL, F0, and low-frequency spectral slope) changed concurrently. Results in the short-term study were largely consistent with the long term. Significant multiple regressions relating changes in VOTc to accompanying changes in postural correlates were found in both studies. This outcome is consistent with hypotheses that predict changes in both VOTc and in postural correlates with the restoration of some hearing and that allow for linkages between the two. Some of the reliable VOTc increases obtained over the long term that were not correlated with postural changes may have been caused directly by auditory validation of articulatory/acoustic relations that underlie synergisms for phoneme production.
对五名人工耳蜗使用者在开启言语处理器之前以及开启后每隔一段时间重复测量其以爆破音开头的音节的语音起始时间（VOT）。在“短期”实验中，在受试者的处理器关闭24小时后读出诱发集，然后再次打开再关闭。五名植入使用者中有四名的清辅音和/或浊辅音VOTc（根据音节时长变化校正后的VOT）从植入前的基线水平增加到1至3年后的最终记录水平。同时测量的语音“姿态”的声学相关参数（平均声压级、基频和低频频谱斜率）也发生了变化。短期研究的结果在很大程度上与长期研究一致。在两项研究中均发现了VOTc的变化与姿态相关参数的伴随变化之间存在显著的多重回归关系。这一结果与预测VOTc和姿态相关参数随部分听力恢复而变化且二者之间存在联系的假设一致。长期获得的一些与姿态变化无关的可靠的VOTc增加可能直接是由对构成音素产生协同作用基础的发音/声学关系的听觉验证引起的。
