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Phondi Meeting: Jon Yip presents

Friday, October 19, 2012
12:00 AM
Lorch 473

Linguistic effects on the timing of gestural coordination in Modern Greek CC sequences

Jon Yip will do a practice run of the presentation that he will give at the upcoming meeting of the Acoustical Society of America in Kansas City later in October. 

Linguistic effects on the timing of gestural coordination in Modern Greek CC sequences

While position in the word, order of place of articulation, and manner of articulation have been shown in various languages to influence gestural timing between consonant sounds, at present it is unclear whether these effects are caused by biomechanical or perceptual-recoverability constraints on production.  This study, which focuses on Modern Greek speakers’ CC productions, tests whether the source of the effects of within-word position (initial, medial), place order (front-to-back, back-to-front), C1 manner (plosive, fricative), and C2 manner (plosive, fricative, liquid) on articulatory lag between C1 and C2 are biomechanical or perceptual in nature.  A perception-oriented account predicts an influence of both C1 and C2 manner on gestural lag when acoustic masking is most likely (when a CC is word-initial and back-to-front), whereas a biomechanical account predicts no such effect.  In order to assess relative degrees of gestural lag, ultrasound imaging and lip video are used to track the timing patterns of labial, tongue-tip, and tongue-dorsum constrictions simultaneously during production.  Supporting both hypotheses, a global effect of place order was found, that is, gestural lag is greater in back-to-front [kt ks kl xt] than in front-to-back [pt ps pl ft].  However, gestural lag measures across C1+C2 manners (i.e. plosive-plosive, plosive-fricative, plosive-lateral, fricative-plosive) show a pattern that is dependent on place order.  Namely, C1-C2 manner does not matter unless the place order is front-to-back, not the other way around as predicted under the perceptual-recoverability account.