All these parts are extremely movable, and under the influence of the muscular contraction, can either enlarge or contract the vocal tube; these motions act progressively according to the height of sound.
This vocal tube does not contribute directly to the production of sound, but favours its formation by the dimensions it is susceptible of taking.
This progressive ascent of the larynx has been considered to influence the gradual augmentation of the acuteness of the tones, since this ascent effects the progressive shortening of the vocal tube
. Some physiologists have doubted whether this shortening of the vocal tube
had the influence which has thus been attributed to it on the degree of acuteness of the vocal sounds.
She was unable to eat orally until recently because surgeries and feeding tubes left her throat and vocal tubes
Personally, I think all pop stars should be forcibly retired, or at least get their vocal tubes
tied, at around 27 - if they haven't managed to kill themselves first.