Developmental aspects of second formant trajectories


  • M.M. Hodge Glenrose Rehabilitation Hospital, Edmonton, Alta., Canada


speech analysis and processing, second formant trajectories, acoustic investigation, talker age, speech movements, vocal tract, consonant, vowel sounds, speech signal, speaking rates, young children, adults, syllable durations, articulatory movement, F2 transition rate


Presents the results of an acoustic investigation of the relationship between increasing talker age and the `speed' of speech movements, i.e., the speed at which the size and shape of the vocal tract changes to produce the sequences of consonant and vowel sounds in the speech signal. The speaking rates of young children are typically slower than those of adults. One factor contributing to the slower speaking rates of children is their greater syllable durations, compared to adults. The purpose of this investigation was to determine if the greater syllable durations of children are attributable to slower rates of articulatory movement as indexed by second formant (F2) transition rate. The specific hypotheses to be tested were that as talker age increased to young adulthood (a) an increase in F2 transition rate (corresponding to an expected increase in speed of articulator movement), and (b) a decrease in the intra-subject variability, in F2 transition rates, would be observed




How to Cite

Hodge M. Developmental aspects of second formant trajectories. Canadian Acoustics [Internet]. 1991 Sep. 1 [cited 2023 Feb. 2];19(4):91-2. Available from:



Proceedings of the Acoustics Week in Canada