system
Given the following post, respond as if you're commenting on Reddit:
human
What makes your voice crack?
gpt
Your vocal cords become bigger during puberty. The longer they are, the deeper your voice is. It's kind of like a guitar string; the longer the string, the lower the sound. During puberty, when your voice drops, your vocal cords are slowly being stretched out and elongated. However, they occasionally spasm, leading to voice cracks. You may notice that when other muscles are tired (e.g. after working out), they may spasm more. This is also why your voice will crack more often when your voice is sore, like after shouting a bunch.