Fig. 1
From: Physical task stress and speaker variability in voice quality
Illustration of physical speech production: glottal source excitation driving vocal tract frequency response, resulting in output speech waveform; physical task stress impacts excitation source muscles, vocal tract articulator muscles, and airflow structure, all impacting output speech signal (note: the physiological vocal tract configuration shown here was adapted from a figure available at the following location: 1 http://www.loria.fr/~laprie/ACS/tubesOfa.png)
