EUROSPEECH 2001 Scandinavia

A lumped physical model of the glottal source is presented. Vocal folds are described as single masses but, unlike conventional onemass models, vertical phase differences between upper and lower margins of the folds are taken into account. This is done by appropriately describing the nonlinear interaction of the mechanical model with aerodynamics, resulting in a modified onemass model, or a 'onedelayedmass model'. Analysis on numerical simulations shows that the system behaves qualitatively as higherdimensional ones (such as the twomass model by Ishizaka and Flanagan); in particular, control over flow skewness is guaranteed, allowing for synthesis of realistic glottal flow waveforms. As only one degree of freedom (one mass) is needed in the model, structure and number of parameters are drastically reduced, thus making it suitable for realtime synthesis applications.
Bibliographic reference. Avanzini, Federico / Alku, Paavo / Karjalainen, Matti (2001): "Onedelayedmass model for efficient synthesis of glottal flow", In EUROSPEECH2001, 5154.