スペクトル全体形状に基づく不特定話者の遙綼母音誮譺

摘要

有声音声は、声帯の振動が音源になり、声帯かrnら唇までの声道と呼ばれる部分が周波数フィルタrnの役割を果たして生成される。この声道フィルタrnの共振ピーク周波数をフォルマント周波数と呼びrn母音は値が低い方の2つのフォルマント周波数rn(F1，F2)を手掛かりとして知覚されると言われrnている。しかし、このフォルマント説のみでは知rn覚を完全に説明しきれず、その他のメカニズムもrn働いていると言われている。%Vowel spectrum has some peaks called formants which are known to be cues for vowel perception. But it is widely believed that there exist other mechanisms in vowel perception. One is the speaker normalization mechanism. The other is the compensation mechanism for coarticulation. There are many studies of each of these two mechanisms but a relationship between these mechanisms is not studied. In this study, four psychophysical experiments were performed to investigate the relationship. The results show that these two mechanisms are not completely independent.