Invariance and variability in the production of the height feature in French vowels

This paper investigates the organization of the vowel space in French speakers. Speakers from 4 years of age to adulthood were recorded in order to generate significant betweenspeaker variability. Each speaker produced repetitions of the ten French oral vowels /i y u e ø o  œ  a/. Acoustic analyses show that despite considerable between-speaker variability in the relative positions of the vowels within the vowel space, speakers tend to produce vowels along a given height degree with a stable F1 value, depending on the speaker, but independently of place of articulation and roundedness. Simulations with the Variable Linear Articulatory Model (VLAM) show that a stable F1 value is basically related to stable tongue heights. The results are discussed in the framework of the Perception-for-Action Control theory (PACT), in which speech units are considered as gestures shaped by perceptual processes. ha l-0 01 95 25 9, v er si on 1 10 D ec 2 00 7