What is an echo, and why does sound bounce?
Sound's Round Trip
What is an echo, and why does sound bounce?
You shout into a canyon and hear your own voice come flying back at you. "Hello!" … "Hello!" It's called an echo, and it feels like magic — but it's just sound doing what sound always does when it hits a wall.
Sound is invisible, but it's real. When you yell, your voice pushes the air around your mouth outward in a wave, like ripples spreading across a pond when you drop a stone. That wave travels forward, carrying your "Hello!" with it.
