The vocal cord extends when the cricoid cartilage moves backwards

If you know how to move the cricothyroid articulation, you probably realize it’s amazing how by using it and having control of this gives you the supreme ability to change your pitch.
I was especially impressed when I confirmed that the cricoid cartilage slides backward while curving, making the vocal cord extend.
People that have larger than average in sized cricoid cartilage, will increase the vocal fold to extend and contract more, because the side of articular fossa is wider, thus resulting in the inferior horn of thyroid cartilage moving more as well.
Curvature movement makes a sharp and strong high-pitched voice, when using the pendant moiety of the cricothyroid muscle.
Slide movements makes a smooth and soft high-pitcehd voice when using the oblique part of the cricothyroid muscle.
If you mix these above movements, both curvarture and sliding, you can produce a superb high-pitched voice.
First before attempting this, please investigate whether your cricothyroid articulation moves properly or not.
The reason being is because a lot of people have hardened their musculus extrinsic laryngis (most of the time unknowingly) by hypertonic vocalization or (larynx in a deep position) LDP. These issues can or will impair the ability to move the cricothyroid articulation properly. If these issues are not a factor, then creating a sharp and strong and a smooth and soft high-pitched voice should come easily when movements of the cricothyroid articulation are controlled.