Gently hold the tongue tip between your teeth while turning your head from side to side. Keep doing both as you change the larynx height to control three different tone colors.

With the tongue tip gently held between your teeth, hum “mmm” through the nose without letting sound escape through the mouth. This is the reference larynx height for this exercise.

Compared with the normal-height Goo “mmm”, make a wider space from mouth to throat, like a large tube, and hum “mmm”. Aim for a deep, thick giant’s voice, as though you were about one meter taller. Keep the tongue tip against the back of the lower front teeth.

In contrast to the lowered-larynx Goo “mmm”, make a bright, piercing voice as if you were a tiny person only a few tens of centimeters tall. Keep holding the tongue tip gently, press the tongue upward to fill the space beneath the palate, and hum “mmm” through the nose. This is challenging: keep the volume moderate and avoid strong tongue retraction that pulls the tip free of the teeth.

Some people will feel much less stable at first because the neck and tongue, which acted as training wheels, are no longer helping in the same way.

Use your most comfortable range and alternate repeatedly between the tiny-person and giant tone colors you can currently make. If the tiny-person voice is difficult, the muscles for the giant voice may be activating involuntarily, so the muscles that raise and lower the larynx pull against each other. Other muscles may also interfere, but for now focus on the larynx. Gradually learn the difference between the sensations of raising and lowering it, and develop the ability to notice unwanted muscle activity, judge it and adjust.