Why do boys' voices crack during puberty?
December 11, 2019 8:24PM
A child has a small larynx and thin vocal cords, which creates a higher pitched voice. When boys hit puberty, they have an increase in testosterone, which causes a lengthening of the larynx and a thickening of the vocal cords. And as children grow, the cavities in their noses and throats enlarge, allowing more space for sound to resonate. All these changes combined result in a lowered voice.
The whole process takes place gradually, but when there is a period of rapid growth, the muscles involved can struggle to properly control the vocal cords. This causes some boys to experience a “crack” or “squeak” in their voices from time to time. It’s completely normal and usually only lasts a few months.