音声の韻律とCALL(<特集>CALLシステムと音響分析)

抄録

Pronunciation training for non-native speakers is viewed focusing on prosodic features. With a brief explanation on prosodic features of speech, necessary functions for pronunciation training system are first pointed out. Then several research works mainly conducted in the author's group are introduced; Japanese accent type training, intonation training, and English stress pattern training. In the work on Japanese accent type training, the fundamental frequency in mora unit was defined which well corresponded to the perceived pitch value. Based on the definition, a method was developed for the accurate recognition of Japanese lexical accents, and was applied to a system for teaching non-Japanese learners pronunciation of Japanese accents. Pronunciation training on intonation and rhythm in sentence level is introduced as an important issue for the future works.