Formantic Analysis of Speech Signal by Wavelet Transform

instantaneous frequencies corresponding to the speech signal formant using the wavelet transform. The developed method is based on an analysis of derivative phase of the continuous Morlet wavelet transform coefficients. Using synthesized signals produced by a formant model made it possible to adapt this method to real speech signals and to determinate the instantaneous formantic frequencies for all the types of speech sounds (isolated vowels, syllables and words). Results are satisfactory and join those obtained by other researchers in the field (who were interested especially in isolated vowels).