Active control and passive consequence of vowel devoicing in Japanese: Evidence of highspeed movies and PGG
* Presenting author
Vowel devoicing is a phenomenon that is found in many languages including Japanese, Korean and Montreal French. Japanese is one of the most explored languages on the mechanism of vowel devoicing (VD). The typical case of VD in Japanese is that high vowels /i/ and /u/ are surrounded by voiceless obstruents. However, the frequency of occurrence of VD differs depending on consonant types, accent, dialects, and so on. Previous physiological studies have shown that VD in Japanese involves both active re-organization of the glottal opening pattern during /C̥VC̥/ and passive overlapping of glottal opening gesture for each voiceless consonant. The former is regarded as phonological and the latter, phonetic. This paper demonstrates the rich variety of the glottal opening pattern during VD using a high-speed movie of the glottis and Photoglottography (PGG). Demonstration covers the difference between stop and fricative consonants and that between Tokyo and Osaka dialects, as well as the pattern of consecutive devoicing and the low vowel devoicing.