女性普通话塞音过渡音征个体特性初探

目的考察塞音过渡音征的个体特性及在说话人鉴定中的价值。方法选取9位女性发音人普通话中的6个塞音与元音/i、a、u/组成的单音节,提取每个音节F2、F3的起点值和目标值进行统计分析,并计算说话人的塞音音轨。结果 （1）过渡音征形态特征在不同说话人之间具有差异;（2）各音节的说话人区分率呈现较大区别,音节/tu/的说话人区分率较高而/khu/音节几乎不具备说话人区分能力;（3）与零声母音节相比,音节中3个元音的F2共振峰频率均值受到塞音的影响而提高,其中/i、a/F2提高的幅度要大于/u/;（4）不同说话人的音轨存在差异。结论在说话人鉴定中选取塞音音节进行比对时要注意不同音节的说话人区分率,尽量避免选取舌根塞音音节;塞音过渡音征的形态和音轨数据可以应用于说话人鉴定。

Study on individual characteristics of stops' transition cue in female mandarin

Objective To explore the individual characteristics of stops＇transiton cue and the values for speaker identification.MethodsMono-syllables composed of six stops and /i、a、u/in female Mandarin were selected for study.The starting and central frequencies of F2 and F3 of vowels were measured for statistical analysis.The loci of stops for each speaker are calculated.Results（1） The pattern of transition cues are different among speakers.（2） The discriminating power of speakers for each syllable varies： syllable /tu/shows higher discriminating power than other syllables and /khu/shows the least discrimination rate.（3） F2 values of the three vowels in stop syllables are higher than their zero-initial syllables.The increasing extent of F2 for /i、a/is greater than /u/.（4） The positions of loci are also different among speakers.Conclusion The power of different syllables for discriminating speakers should be addressed in speaker identification and the velar stop syllable should be avoided.The pattern of stop transition cue and the position of loci are useful acoustical parameters for speaker identification.