Abstract
The present study considers the muscle impedance control of upper lip-jaw coordination for jaw mechanical perturbations during bilabial utterances. When we perturbed jaw movement for the/Φ/utterance in the carrier sentences of "kono a a a mitai", labial distance was recovered quickly by the downward shift of the upper lip [8]. Initial downward shift (40ms after the load onset) of the upper lip by the perturbation was larger when the load was supplied at the closing phase when preparing for the first/Φ/than that at the opening phase when preparing for the second/a/in the sentence. This result suggests that the stiffness between upper lip and jaw varies depending on speech tasks. To characterize this difference, we estimated the stiffness changes of both utterances by using an upper lip-jaw spring model with positional shifts of the first/Φ/and the second/a/. The estimated ratio of the upper lip-jaw stiffness for/Φ/to that for/a/indicates that the stiffness increased in bilabial utterances. In addition, temporal variation of stiffness highly correlated with that of muscle activity. Moreover, we have succeeded to reproduce such compensatory movements by using a dynamical simulation of the mechanical linkage model with the perturbed jaw responses and estimated stiffness-change. These results suggest that the observed compensatory movements are generated by regulating passive muscle-linkages.
| Original language | English |
|---|---|
| Title of host publication | 6th International Conference on Spoken Language Processing, ICSLP 2000 |
| Publisher | International Speech Communication Association |
| ISBN (Electronic) | 7801501144, 9787801501141 |
| Publication status | Published - 2000 |
| Externally published | Yes |
| Event | 6th International Conference on Spoken Language Processing, ICSLP 2000 - Beijing, China Duration: 2000 Oct 16 → 2000 Oct 20 |
Other
| Other | 6th International Conference on Spoken Language Processing, ICSLP 2000 |
|---|---|
| Country | China |
| City | Beijing |
| Period | 00/10/16 → 00/10/20 |
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ASJC Scopus subject areas
- Linguistics and Language
- Language and Linguistics
Cite this
Model of the mechanical linkage of the upper lip-jaw for the articulatory coordination. / Ito, Takayuki; Gomi, Hiroaki; Honda, Masaaki.
6th International Conference on Spoken Language Processing, ICSLP 2000. International Speech Communication Association, 2000.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Model of the mechanical linkage of the upper lip-jaw for the articulatory coordination
AU - Ito, Takayuki
AU - Gomi, Hiroaki
AU - Honda, Masaaki
PY - 2000
Y1 - 2000
N2 - The present study considers the muscle impedance control of upper lip-jaw coordination for jaw mechanical perturbations during bilabial utterances. When we perturbed jaw movement for the/Φ/utterance in the carrier sentences of "kono a a a mitai", labial distance was recovered quickly by the downward shift of the upper lip [8]. Initial downward shift (40ms after the load onset) of the upper lip by the perturbation was larger when the load was supplied at the closing phase when preparing for the first/Φ/than that at the opening phase when preparing for the second/a/in the sentence. This result suggests that the stiffness between upper lip and jaw varies depending on speech tasks. To characterize this difference, we estimated the stiffness changes of both utterances by using an upper lip-jaw spring model with positional shifts of the first/Φ/and the second/a/. The estimated ratio of the upper lip-jaw stiffness for/Φ/to that for/a/indicates that the stiffness increased in bilabial utterances. In addition, temporal variation of stiffness highly correlated with that of muscle activity. Moreover, we have succeeded to reproduce such compensatory movements by using a dynamical simulation of the mechanical linkage model with the perturbed jaw responses and estimated stiffness-change. These results suggest that the observed compensatory movements are generated by regulating passive muscle-linkages.
AB - The present study considers the muscle impedance control of upper lip-jaw coordination for jaw mechanical perturbations during bilabial utterances. When we perturbed jaw movement for the/Φ/utterance in the carrier sentences of "kono a a a mitai", labial distance was recovered quickly by the downward shift of the upper lip [8]. Initial downward shift (40ms after the load onset) of the upper lip by the perturbation was larger when the load was supplied at the closing phase when preparing for the first/Φ/than that at the opening phase when preparing for the second/a/in the sentence. This result suggests that the stiffness between upper lip and jaw varies depending on speech tasks. To characterize this difference, we estimated the stiffness changes of both utterances by using an upper lip-jaw spring model with positional shifts of the first/Φ/and the second/a/. The estimated ratio of the upper lip-jaw stiffness for/Φ/to that for/a/indicates that the stiffness increased in bilabial utterances. In addition, temporal variation of stiffness highly correlated with that of muscle activity. Moreover, we have succeeded to reproduce such compensatory movements by using a dynamical simulation of the mechanical linkage model with the perturbed jaw responses and estimated stiffness-change. These results suggest that the observed compensatory movements are generated by regulating passive muscle-linkages.
UR - http://www.scopus.com/inward/record.url?scp=85009089423&partnerID=8YFLogxK
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M3 - Conference contribution
AN - SCOPUS:85009089423
BT - 6th International Conference on Spoken Language Processing, ICSLP 2000
PB - International Speech Communication Association
ER -