system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does the sound of poured water gets higher and higher as you keep pouring?
gpt
Because the sound you're hearing is sound coming out of a round chamber. When the glass fills with water, the size of the chamber changes, so the pitch changes. Large chamber, low pitch. Small chamber, high pitch. It's why digieridoos are deep and rumbly while ocarinas are high pitched and whiny.