VOCAL-TRACT AERODYNAMICS IN VERTICAL-BAR-ACA-VERTICAL-BAR UTTERANCES - SIMULATIONS

Aerodynamic simulations of /aCa/ utterances were made using a low-freq uency model for upper vocal tract airflow and a two-mass model for the voice source. These simulations helped increase insight into the resu lts of an empirical study of flow during running speech. The various s ources of flow, including wall compliance, were examined for their con tributions to total Bow from the mouth. The two-mass model was modifie d to allow for more natural glottal flow during abduction and adductio n. Even with modifications the two-mass model was not sufficient to mo del source variations during running speech.