Abstract: The perception difference of syllables caused by co-articulation effect was studied through similarity perception experiments, with college students as subjects. The results showed that co-articulation effect caused variations in segment. Furthermore, the variations were mainly affected by vowel of the syllable just before the target syllable and consonant of the syllable just after the target syllable. To the syllable in different sentence context, the perception similarity is more significantly influenced by suprasegmental variations than by co-articulation effect

Key words: co-articulation, segment, suprasegment, acoustic parameter