system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do pipes in the shower sing when certain temperatures of water goes through them?
gpt
It has to do with the vibrations caused by the water flowing through the valve. As you turn it to hot, the cold valve starts to close off more until it's barely passing water through and causes it to whistle, just like whistling with your lips. You have to restrict the airflow by closing off your lips to create the whistle sound and as you change the speed of the air and size of opening in your lips, the sound changes with it. This is what's happening with the water and the valves in your shower. The temperature doesn't matter to the sound, it's just that when you turn it up hotter you're closing off the cold valve more and more.