Interaction between glottal and vocal-tract aerodynamics in a comprehensive model of the speech apparatus. Paul Boersma, University of Amsterdam August, 1995 Our computer model of the speech apparatus converts muscle activities into the resulting tissue movements, air pressures, air velocities, and sound. Contents: The model. The whole speech apparatus is modelled as sequences of tubes with yielding walls (Boersma 1993). Lung pressure. Is a direct consequence of controlling the target width of the lungs. Events in the glottis. All the parts of the glottal cycle can be understood. Trills. Passive vibrations everywhere, just as easily as vibrating vocal folds. Voicing in obstruents. Make the [aba]-[apa] contrast by varying oral wall stiffness only! Bilabial click. Seven listeners showed faithful imitation of a realistically modelled sucking effect.