The three actions necessary to successfully reach the high register


There are three actions necessary to successfully reach the high register.
The vocal chord decides the pitch and sound of your voice.
The vocal chord’s status is…

Yes, all of the above.
You already know that a vocal cord is composed of muscle and mucosa. Although people think that its shape and density is similar to a string or line, it is really the thickness which makes the voice high-pitched.
(1)…The cricothyroid articulation extends the vocal chord which creates a hinge and slide movement.
(2)…Thinning the vocal chord, there is a difference between the muscle and mucosa. The thickness of vocal cord muscles can be changed by changing the angle of rotation on the arytenoid cartilage. It cannot control the muscle by itself, so the vocal chord must be thought of as a planar, which is two dimensional but clearly not a string or line. The thickness of mucosa is controlled by the moisture content, if it’s too much moisture, the vocal chord is swollen and makes a low vocal pitch. Meanwhile, if there is too little moisture, it will dry up and obstruct the vocal chord vibrations. It’s the same with skin, lively and well moistened is the best condition.
The tone of a high-pitched sound is supposed to sound thin.
(3)…Harding the vocal chord only relates to the muscles of vocal chord.
If the muscle hardens like a stone, the vocal chord vibrates less and can make a high-pitched sound, but the tone may sound metallic/thin. Therefore, it might be considered ‘not artistic.’
Choose one of three or combine these three, which will make a high-pitched sound, but the attractive high-pitched sound is mainly made in (1).
I would like you to move the cricothyroid articulation. This flexibly will help in reaching the higher pitches, by means of extending the vocal chord.