Sensibilité au débit et marquage accentuel des phonèmes en franaçais

The aim of this work is to determine the way the prosodic scene reorganises itself according to speech rate variations in French. We present the temporal structure study of a one thousand word speech corpus. The corpus was produced at three different rates (normal, fast and slow) by one speaker with two repetitions. The goal is to study the relationship between speech rate sensitivity and accentual markedness of phoneme. Results put in light that phoneme does not behave the same way if stressed or not and if consonantic or vocalic. Unstressed phonemes are less rate sensitive than stressed ones. Vowels are more rate sensitive than consonants, especially when stressed. Nevertheless, consonants are rate sensitive in such proportions when stressed that it is not possible to say, as usually said, that it is the vowel which carries stress.