Adaptive control of vowel formant frequency: Evidence from real-time formant manipulation
Adaptive control of vowel formant frequency: Evidence from real-time formant manipulation
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DOI：
10.1121/1.2217714
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发表时间：
2006-08-01
影响因子：
2.4
通讯作者：
Munhall, Kevin G.
中科院分区：
文献类型：
--
作者：
Purcell, David W.;Munhall, Kevin G.
众所周知，语音产生过程中的听觉反馈在语音采集中发挥着重要作用，并且对于维持准确的发音也很重要。在两项研究中，单音节辅音-元音-辅音单词 (CVC) 的第一个共振峰 (F1) 通过电子方式转换并很快反馈给参与者，以便参与者将修改后的语音视为自己的作品。当反馈向上移动（实验 1 和 2）或向下移动（实验 1）时，参与者通过在与基线相反的频率方向上产生 F1 来进行补偿。在 F1 中启动补偿的操纵阈值大小通常大于 60 Hz。当返回正常反馈时，F1 并没有立即返回到基线，而是表现出指数去适应模式。实验一表明，这种效果不受 F1 移动方向的影响，F1 的升高和降低都表现出相同的效果。实验 2 表明，操纵 F1 保持在最大频率偏移的试验次数（0、15、45 次试验）不会影响适应的恢复。基线记录中 F1 的试验间变化的滞后自相关与补偿幅度之间存在相关性。因此，一些参与者似乎在一次又一次的试验中更积极地稳定他们的生产。结果提供了对言语的感知控制和控制感觉刺激器协调的表征的深入了解。 (c) 2006 年美国声学学会。
Auditory feedback during speech production is known to play a role in speech sound acquisition and is also important for the maintenance of accurate articulation. In two studies the first formant (F1) of monosyllabic consonant-vowel-consonant words (CVCs) was shifted electronically and fed back to the participant very quickly so that participants perceived the modified speech as their own productions. When feedback was shifted up (experiment 1 and 2) or down (experiment 1) participants compensated by producing F1 in the opposite frequency direction from baseline. The threshold size of manipulation that initiated a compensation in F1 was usually greater than 60 Hz. When normal feedback was returned, F1 did not return immediately to baseline but showed an exponential deadaptation pattern. Experiment I showed that this effect was not influenced by the direction of the F1 shift, with both raising and lowering of F1 exhibiting the same effects. Experiment 2 showed that manipulating the number of trials that F1 was held at the maximum shift in frequency (0, 15, 45 trials) did not influence the recovery from adaptation. There was a correlation between the lag-one autocorrelation of trial-to-trial changes in F1 in the baseline recordings and the magnitude of compensation. Some participants therefore appeared to more actively stabilize their productions from trial-to-trial. The results provide insight into the perceptual control of speech and the representations that govern sensorimcitor coordination. (c) 2006 Acoustical Society of America.