Τρίτη 28 Φεβρουαρίου 2017

The Quantal Larynx: The Stable Regions of Laryngeal Biomechanics and Implications for Speech Production

Purpose
Recent proposals suggest that (a) the high dimensionality of speech motor control may be reduced via modular neuromuscular organization that takes advantage of intrinsic biomechanical regions of stability and (b) computational modeling provides a means to study whether and how such modularization works. In this study, the focus is on the larynx, a structure that is fundamental to speech production because of its role in phonation and numerous articulatory functions.
Method
A 3-dimensional model of the larynx was created using the ArtiSynth platform (http://ift.tt/2lPoHkZ). This model was used to simulate laryngeal articulatory states, including inspiration, glottal fricative, modal prephonation, plain glottal stop, vocal–ventricular stop, and aryepiglotto–epiglottal stop and fricative.
Results
Speech-relevant laryngeal biomechanics is rich with “quantal” or highly stable regions within muscle activation space.
Conclusions
Quantal laryngeal biomechanics complement a modular view of speech control and have implications for the articulatory–biomechanical grounding of numerous phonetic and phonological phenomena.

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