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The pressure and the collision forces were inserted into the equation of motion, and the result was simulated.
Figure 2: Area Opening and Volumetric Flow Rate
Figure 2 shows that an oscillating volumetric flow rate was achieved by passing a constant airflow through the vocal folds. When simulating the oscillation, it was found that the collision force limits the amplitude of oscillation rather than drive the oscillation. Which tells us that the pressure force is what allows the sustained oscillation to occur.
