Abstract
In order to model the movements of the speech articulators using a dynamical systems approach, it is necessary to specify (1) the specific form of the dynamical equation, (2) the portion of the articulatory trajectory being described/generated by the equation—the “window,” and (3) the values of the coefficients to be used in the equation. In this work, a damped mass‐spring dynamical system is assumed, as used in previous task dynamic modeling [Saltzman et al., J. Acoust. Soc. Am. Suppl. 1 82, S15 (1987)]. A program was developed to determine the values of the coefficients for the equations, using various definitions of the articulatory window. The program uses a nonlinear least‐squares algorithm to determine the best fit between the observed trajectories and the trajectories generated using a range of values for the coefficients. This program is currently being tested on simulated data with known parameters in order to establish the accuracy and limitations of the procedure. There will be a report on the reliability of the analyses performed using this approach, with an emphasis on numerical considerations. [Work supported by Grant BNS‐8520709 from NSF and Grants HD‐01994 and NS‐13617 from NIH.]
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