日本語朗読文の母音の強度

概要

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The peak intensity values of vowels in several CV moras were studied, using a passage of news-broadcasting read by a professional male speaker. Several factors operate in determining vowel intensity. (1) Grammatical function of the word in which the vowel is located: the most significant and consistent difference is higher intensities for nouns than verbs; however, vowels in reduced nouns with more functional roles (such as /ka/ in "no-naka-de" <in the>) show verb-like intensities. (2)Phrasal or sentential position of the mora: the vowel intensity is higher at the beginning and lower near the end. (3) Position within the word and word length: vowels in the first three moras of a noun are relatively high in intensity, while those near the end of a long compound noun (12th and later) are extremely low. (4)Vowels in particles and verb inflections are high in intensity when there is a strong continuation to the following word or phrase. (5) Accent patterns generally do not play a significant role; however, certain articulatory sequences produce a dramatic intensity difference between accented and non-accented vowels in the first mora of a word.
社団法人日本音響学会の論文