Adaptive computation of articulatory parameters from the speech signal.
An unconstrained optimization technique is used to find the values of parameters, of a combination of an articulatory and a vocal tract model, that minimize the difference between model spectra and natural speech spectra. The articulatory model is anatomically realistic and the vocal tract model is a "lossy" Webster equation for which a method of solution is given. For English vowels in the steady state, anatomically reasonable articulatory configurations whose corresponding spectra match those of human speech to within 2 dB have been computed in fewer than ten iterations. Results are also given which demonstrate a limited ability of the system to track the articulatory dynamics of voiced speech.
D001833:Body Temperature Regulation; D006801:Humans; D007830:Larynx / Q000502:physiology; D008433:Mathematics; D008953:Models, Anatomic; D008954:Models, Biological; D009055:Mouth / Q000502:physiology; D013018:Sound Spectrography; D013060:Speech / Q000502:physiology*; D013061:Speech Acoustics