Question

It is essential to change the tension on the vocal cords as we produce different sounds notes from our larynx

Answer 1

Yes it is essential because different types of vibrations produced in our larynx decides the pitch ,intensityand sound notes

Answer 2

Different sound notes corresponds to frequencies. The frequencies of the sound depends on the tension in the vocal cords hence, it is essential to change the tension on the vocal cords, as we produce different sound notes from our larynx.