Frequency change

Laryngeal frequently is converted to pharyngeal frequently.

The fundamental frequency of the vocal folds can be changed by altering the physical properties of the wave's source or medium. This can be achieved by changing the length, tension, or density of the medium or by adjusting the speed of the wave within the medium. 

Medium Properties:

For sound waves in the vocal react (like a pipe), the fundamental frequency depends on the speed of sound in the medium and the length of the tube. 

Changing the pharyngeal soft flexible tissue medium will affect the speed of sound and therefore the fundamental frequency. 

The length of the tube also plays a role. Open-ended tubes have a different relationship between length and frequency compared to closed-ended tubes.