Lotto A J, Kluender K R, Green K P
University of Wisconsin, Madison, USA.
Percept Psychophys. 1996 Oct;58(7):1005-14. doi: 10.3758/bf03206828.
Perception of voicing for stop consonants in consonant-vowel syllables can be affected by the duration of the following vowel so that longer vowels lead to more "voiced" responses. On the basis of several experiments, Green, Stevens, and Kuhl (1994) concluded that continuity of fundamental frequency (f0), but not continuity of formant structure, determined the effective length of the following vowel. In an extension of those efforts, we found here that both effects were critically dependent on particular f0s and formant values. First, discontinuity in f0 does not necessarily preclude the vowel length effect because the effect maintains when f0 changes from 200 to 100 Hz, and 200-Hz partials extend continuously through test syllables. Second, spectral discontinuity does preclude the vowel length effect when formant changes result in a spectral peak shifting to another harmonic. The results indicate that the effectiveness of stimulus changes for sustaining or diminishing the vowel length effect depends critically on particulars of spectral composition.
在辅音 - 元音音节中，对于塞音的浊音感知会受到后续元音时长的影响，即较长的元音会导致更多的“浊音”反应。基于多项实验，格林、史蒂文斯和库尔（1994年）得出结论，基频（f0）的连续性而非共振峰结构的连续性决定了后续元音的有效时长。在这些研究的扩展中，我们在此发现这两种效应都严重依赖于特定的f0和共振峰数值。首先，f0的不连续性不一定会排除元音时长效应，因为当f0从200赫兹变为100赫兹且200赫兹的分音连续贯穿测试音节时，该效应依然存在。其次，当共振峰变化导致频谱峰值转移到另一个谐波时，频谱不连续性确实会排除元音时长效应。结果表明，刺激变化对于维持或减弱元音时长效应的有效性严重依赖于频谱组成的细节。
