Vowel posture normalization.
Vowel posture normalization.
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DOI：
10.1121/1.423750
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发表时间：
1998-10
期刊：
影响因子：
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通讯作者：
M. Hashi;J. Westbury;Kiyoshi Honda
中科院分区：
文献类型：
--
作者：
M. Hashi;J. Westbury;Kiyoshi Honda
一个简单的归一化程序应用于点参数化发音数据，以产生定量的“平均”元音姿势的说话人一般描述。从现有的x射线微束数据库语料库中提取的20名英语使用者和8名日语使用者的发音数据被纳入分析。归一化过程的目的是尽量减少声道大小和形状的差异对原始数据得出的平均姿势的影响。这一过程导致两个语言群体在标准化空间的y维度上的跨说话者差异普遍减少。这个结果可以追溯到原始数据的y维（即腭高）“成功地从规范化数据中删除”的系统性方差来源。该程序并没有导致x维度上交叉说话者方差的可比的、普遍的减少。这个否定的结果部分可以追溯到新的观察，在英语样本中，一些人习惯性地把舌头放在所有元音的前面，而另一些人习惯性地把舌头放在后面。讨论了评估发音规范化方案的方法，以及元音姿势中说话人之间变化的可能来源。
A simple normalization procedure was applied to point-parametrized articulatory data to yield quantitative speaker-general descriptions of "average" vowel postures. Articulatory data from 20 English and 8 Japanese speakers, drawn from existing x-ray microbeam database corpora, were included in the analysis. The purpose of the normalization procedure was to minimize the effects of differences in vocal tract size and shape on average postures derived from the raw data. The procedure resulted in a general reduction of cross-speaker variance in the y dimension of the normalized space, within both language groups. This result can be traced to a systematic source of variance in the y dimension of the raw data (i.e., palatal height) "successfully removed" from the normalized data. The procedure did not result in a comparable, general reduction in cross-speaker variance in the x dimension. This negative result can be traced partly to the new observation that some speakers within the English sample habitually placed their tongues in a fronted position for all vowels, whereas other speakers habitually placed their tongues in a rearward position. Methods for evaluating articulatory normalization schemes, and possible sources of interspeaker variability in vowel postures, are discussed.