Pind J
Faculty of Social Sciences, University of Iceland, Reykjavik.
Scand J Psychol. 1996 Jun;37(2):121-31. doi: 10.1111/j.1467-9450.1996.tb00645.x.
Previous research has shown that the ratio of vowel to rhyme (vowel + consonant) duration is a major cue for quantity in Icelandic. In particular it serves as a higher-order invariant which enables the listener to disentangle those durational transformations of the speech signal which are "extrinsic" (e.g. due to changes in speaking rate) from those which are "intrinsic" to the phonemic message, involving a change of phonemic quantity. Previous research has been based on speech segment contrasts which are purely durational, involving vowels with a uniform spectrum whether phonemically long or short, such as [a] or [I]. This paper looks at the role of spectral factors in vowels which are spectrally dissimilar in their long and short varieties. It is shown that in these cases the spectral differences can be sufficiently great to override the previously established relational invariant for quantity. The implications of this finding for a model of quantity perception are discussed.
先前的研究表明，在冰岛语中，元音与韵律（元音+辅音）时长的比率是判断音长的主要线索。特别是，它作为一种高阶不变量，使听众能够区分语音信号中那些“外在的”时长变化（例如由于语速变化）和那些对音位信息而言“内在的”时长变化，后者涉及音位数量的改变。先前的研究基于纯粹时长的语音片段对比，涉及无论音位上是长元音还是短元音都具有均匀频谱的元音，比如[a]或[I]。本文研究了长元音和短元音在频谱上不同的元音中频谱因素的作用。结果表明，在这些情况下，频谱差异可能足够大，以至于能够推翻先前确立的音长关系不变量。本文还讨论了这一发现对音长感知模型的影响。
