To clarify the acoustic variables for predicting and classifying Japanese singleton and geminate consonants, raw and logarithmic durations of the consonants and their related segments were examined using 12 minimal pair words that were pronounced in a carrier sentence at various speaking rates by 20 native Japanese speakers. Regression and discriminant analyses revealed that the logarithmic durations were better at predicting and classifying Japanese singleton and geminate consonants than the raw durations used in many previous studies. Specifically, the best acoustic variables were the logarithmic duration of the consonant's closure or frication and the logarithmic average duration of the mora in the preceding carrier phrase. These results suggest that logarithmic durations are relational invariant acoustic variables that can cope with the durational variations of singleton and geminate consonants in a wide range of speaking rates.

中文翻译：

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使用对数持续时间预测和分类日语单音和双辅音

为了阐明用于预测和分类日语单音和双辅音的声学变量，辅音的原始和对数持续时间及其相关片段使用 12 个最小对词进行了检查，这些词在载体句子中以不同的语速由 20 位母语为日语的人发音。回归和判别分析表明，对数持续时间比以前许多研究中使用的原始持续时间更能预测和分类日语单音和双辅音。具体来说，最好的声学变量是辅音闭合或摩擦的对数持续时间和前面载波短语中莫拉的对数平均持续时间。