How does a speaker make sound from electricity?
Electric Dance Party
How does a speaker make sound from electricity?
You press play on your favorite song, and suddenly your speaker is thumping, jingling, crooning — filling the room with sound. But here's the weird part: the file on your phone is just numbers. The wire feeding your speaker carries electricity. Somewhere between the plug and your ears, electricity becomes music. How?
Sound is air molecules bumping into each other in waves — like a stadium crowd doing the wave with their bodies. When something vibrates back and forth really fast, it shoves air molecules, which shove their neighbors, which shove their neighbors, all the way to your eardrums. Your speaker's job is to vibrate. But electricity doesn't vibrate. It flows.
