Voice efficiency for different voice qualities combining experimentally derived sound signals and numerical modeling of the vocal tract by Mario Fleischer, Stefanie Rummel, Fiona Stritt, Fiona Stritt, Johannes Fischer, Johannes Fischer, Michael Bock, Michael Bock, Matthias Echternach, Bernhard Richter, Bernhard Richter, Louisa Traser, Louisa Traser

“…This single-subject study attempts to quantify the acoustic sound intensity within the human glottis depending on different vocal tract configurations and vocal fold vibration.Methods: Combining Finite-Element-Models derived from 3D-MRI data, audio recordings, and electroglottography (EGG) we analyzed vocal tract transfer functions, particle velocity and acoustic pressure at the glottis, and EGG-related quantities to evaluate voice efficiency at the glottal level and resonance characteristics of different voice qualities according to Estill Voice Training®.Results: Voice qualities Opera and Belting represent highly efficient strategies but apply different vowel strategies and should thus be capable of predominate orchestral sounds. …”
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