Burnett T A, Freedland M B, Larson C R, Hain T C
Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois 60208, USA.
J Acoust Soc Am. 1998 Jun;103(6):3153-61. doi: 10.1121/1.423073.
Recent studies have shown that when phonating subjects hear their voice pitch feedback shift upward or downward, they respond with a change in voice fundamental frequency (F0) output. Three experiments were performed to improve our understanding of this response and to explore the effects of different stimulus variables on voice F0 responses to pitch-shift stimuli. In experiment 1, it was found that neither the absolute level of feedback intensity nor the presence of pink masking noise significantly affect magnitude or latency of the voice F0 response. In experiment 2, changes in stimulus magnitude led to no systematic differences in response magnitudes or latencies. However, as stimulus magnitude was increased from 25 to 300 cents, the proportion of responses that changed in the direction opposite that of the stimulus ("opposing" response) decreased. A corresponding increase was observed in the proportion of same direction responses ("following" response). In experiment 3, increases in pitch-shift stimulus durations from 20 to 100 ms led to no differences in the F0 response. Durations between 100 and 500 ms led to longer duration voice F0 responses with greater response magnitude, and suggested the existence of a second F0 response with a longer latency than the first.
最近的研究表明，当发声受试者听到其音高反馈向上或向下变化时，他们会以改变语音基频（F0）输出作为回应。进行了三项实验，以增进我们对这种反应的理解，并探索不同刺激变量对语音F0对音高变化刺激反应的影响。在实验1中，发现反馈强度的绝对水平或粉红掩蔽噪声的存在均未显著影响语音F0反应的幅度或潜伏期。在实验2中，刺激幅度的变化并未导致反应幅度或潜伏期出现系统性差异。然而，随着刺激幅度从25音分增加到300音分，与刺激方向相反变化的反应比例（“反向”反应）降低。同向反应（“跟随”反应）的比例则相应增加。在实验3中，音高变化刺激持续时间从20毫秒增加到100毫秒，F0反应没有差异。持续时间在100至500毫秒之间会导致语音F0反应持续时间更长，反应幅度更大，并表明存在第二种F0反应，其潜伏期比第一种更长。
