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Why are there high and low sounds?

Air's Speed Dance
Why are there high and low sounds?
Imagine you're standing in a room where someone plays a single deep note on a piano—~~BOOM~~—and then a tiny bell goes ~

Imagine you're standing in a room where someone plays a single deep note on a piano—BOOM—and then a tiny bell goes ting. Same room, same air, same ears. So why does one sound feel like it's rumbling through your chest while the other dances on top of your head?

Sound is air doing the wave. When something makes noise—a drumhead, a guitar string, your vocal cords—it shakes back and forth super fast, pushing air molecules into their neighbors, who push into their neighbors, and so on. That chain of pushes travels through the room like a ripple across a pond, except it's invisible and made of squished and stretched air.

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