title: Task dynamic and articulatory recovery of lip and velar approximations under model mismatch conditions.
abstract: An algorithm for recovering task dynamics and speech articulator movements from speech acoustics was tested under various model mismatch conditions. There was evidence of articulatory compensation to recover tract-variable (constriction) trajectories in speech produced with a lip approximation under sufficiently constrained conditions. However, in more extensive studies of lip and velar approximations, the recovered tract-variable trajectories were also different from those of the data-producing utterance. This phenomenon can occur because the matching criterion in the analysis-by-synthesis procedure is an acoustic criterion and the correspondence between the tract-variable trajectories and the acoustic output is not exact. While there may be some tract-variable compensation to attain a good acoustic match, there is evidence of a correspondence between how well the tract-variable trajectories match and how well the formant frequencies match in particular instances.
authors.affiliation: Haskins Laboratories, New Haven, Connecticut 06511-6695, USA.
authors.forename: R S
authors.initials: RS
authors.lastname: McGowan
authors.forename: M
authors.initials: M
authors.lastname: Lee
mesh_terms: D006801:Humans; D008046:Lip; D008953:Models, Anatomic; D010160:Palate, Soft; D013061:Speech Acoustics