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- Atte Aalto, Paavo Alku, Jarmo Malinen
- MAVEBA
- 2009

We discuss a novel low-order massspring model of human vocal folds with incompressible 1D flow. Our model consists of three subsystems: a flow model, a nonsymmetric mass-spring model for the vocal folds, and a resonator representing the vocal tract (VT).

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 [21]. We also present an example of such composition… (More)

- Atte Aalto, Jarmo Malinen
- 2010

Wave propagation problems on networks arise in many fields of technology. Let us give a brief list of possible applications: •Acoustics: for example the human vocal tract can be considered as a Y-shaped graph; •Mechanics: wave propagation in Timoshenko beam structures. For example, jointed beams and beams with parameter discontinuities can be regarded as… (More)

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 prove the unique solvability, passivity/conservativity and some regularity results of two mathematical models for acoustic wave propagation in curved, variable diameter tubular structures of finite length. The first of the models is the generalised Webster’s model that includes dissipation and curvature of the 1D waveguide. The second model is the… (More)

- Atte Aalto
- Systems & Control Letters
- 2016

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)

- Atte Aalto, Jarmo Malinen, TEKNILLINEN KORKEAKOULU, TEKNISKA HÖGSKOLAN
- 2010

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)

- Atte Aalto
- Katilolehti
- 1980

- Atte Aalto
- Int. J. Control
- 2016

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