system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do our voices change as we age? What causes the stereotypical "old person voice"?
gpt
Your vocal cords create sounds by vibrating against each other, powered by your breath and stabilized with your torso muscles. As you get older the cords can become less flexible, dryer, and your muscles can be weaker at powering the whole operation.