Why Does a Boy's Voice Change?Voice change is a normal stage of puberty for boys, but it can be a bit of a mystery when it happens. The reason your son's voice occasionally cracks or sounds squeaky is due to the growth of the voice box, or larynx. Before puberty the voice box is small. During and after puberty, the voice box is bigger and the vocal cords are thicker and longer than they were before puberty - which explains why post-pubescent boys and men have a deep voice and boys do not.
You may physically notice the growth of your son's larynx as an enlargement of his Adam's apple.
How Can I Help My Son Deal with His Voice Change?Voice change is normal, and there's a chance your son may not even realize that his voice is deepening and lowering. But he may be embarrassed when his voice cracks or squeaks in front of others. He should know that these cracks are only temporary, and that they will stop when his larynx is finished growing.
Your son may find that clearing his throat and waiting a few seconds will help him regain control over his voice. Mints, chewing gum, and lozenges aren't likely to help, but they may make your tween feel as though he has some control over his voice change.