Figure 1
From: Biomechanics of sound production in high-pitched classical singing

Schematic overview of Aero-Acoustic (AA) and MyoElastic-AeroDynamic (MEAD) voice production mechanisms. (A) Mid-sagittal view of rodent larynx, illustrating the formation of the impinging jet in AA sound production; (B) schematic display of the lack of tissue vibration in the AA mechanism and the resulting sinusoidal sound source; (C) coronal view of human larynx, illustrating the open and the closed phase of medio-lateral vocal fold vibration; (D) vocal fold displacement pattern and resulting prototypical acoustic voice source22 for the MEAD mechanism.