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We study the mechanical feedback coupling between the human vocal folds and vocal tract (VT) by simulating fundamental frequency glides over the lowest VT resonance. In the classical source– filter theory of speech production, the vocal folds produce a signal which is filtered by the resonator, vocal tract without any feedback. We have developed a(More)
We show that for linear dynamical systems with skew-adjoint generators, the initial state estimate given by the back and forth nudging method with colocated feedback, converges to the minimizer of the discrepancy between the measured and simulated outputs — given that the observer gains are chosen suitably and the system is exactly observable. If the(More)
We show under mild assumptions that a composition of internally well-posed, impedance passive (or conservative) boundary control systems through Kirchhoff type connections is also an internally well-posed, impedance passive (resp., conservative) boundary control system. The proof is based on results of [19]. We also present two examples of such compositions(More)
We present experimental and simulation results on the production of fundamental frequency glides. When the frequency of the vocal fold vibration approaches an acoustic resonance of the vocal tract, a modal locking phenomenon is expected to affect the production of such a glide. Simulations by a vowel production model for glottis and vocal tract provide(More)
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