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  • Ulrich Natke - Abstract
    computer equipment provides an easy to handle and low cost two channel recording technique to pick up the EGG and acoustic speech signal in parallel These records can be used to extract direct and derived parameters from both signals like voice onset time open quotient or degree of audio phonatoric coupling With regard to stuttering this technique is useful as a training aid with which ongoing speech production can be

    Original URL path: http://www.ulrichnatke.de/info/abs_natke1997.html (2016-04-29)
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  • Ulrich Natke - Abstract
    included into actual speech sounds Speaking then means to invert this transformation neurally The related inverse model can be acquired by auto imitation In order to identify the control type of speaking we tried to measure inertia stiffness and damping of the jaw during speech For this sake we applied an external force impulse with known shape to the jaw and recorded the related acceleration velocity and position This is an auto imitation like procedure and should provide the parameters looked for However it turned out that mathematically the problem is ill posed whereby small errors in the recorded data will lead to big errors in the parameters to be estimated Typical regularization methods failed To get deeper insight into the problem we simulated a three jointed arm and the acquisition of its control An exact solution of the inverse dynamics could only be obtained with no noise in the feedback lines Already under moderate noise in 5 10 percent of the cases misguided learning or cured disrupting movement control which follows from the ill posedness also present in this instance We concluded that the organism is exposed to the same problem when trying to get control of the articulators

    Original URL path: http://www.ulrichnatke.de/info/abs_km1997.html (2016-04-29)
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