Can a voice get deeper in puberty?

Yes, a person's voice can get deeper during puberty. This is due to the hormonal changes that occur during this time, particularly the increase in testosterone in males. Testosterone causes the vocal cords to lengthen and thicken, which results in a lower pitch. In addition, the vocal tract, including the larynx, pharynx, and sinuses, also undergoes changes during puberty, which contribute to the deepening of the voice. These changes can begin around the age of 11 or 12 in males and a few years earlier in females, but the exact timing and extent of the changes can vary among individuals.