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SIMPLEExplained Simply · #8EP.160 · 24 s

Explained Simply #8: How does a speaker turn electricity into sound?

Cover of the lesson: Explained Simply #8: How does a speaker turn electricity into sound?Coming to YouTube soon
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// WHAT YOU WILL LEARN

A speaker = magnet + coil + cone: current makes the coil a magnet, the flipping (AC) current pushes and pulls it, and the cone squeezes the air into sound waves (note A = 440 a second).

// LESSON NOTES

How does a speaker turn electricity into SOUND? 🔊

Inside every speaker: a magnet 🧲, a coil of wire 🌀 and a light paper cone.
⚡ Current in the coil turns it into a magnet too.
🔁 Music is a current that flips direction — so the magnet pushes, pulls, pushes, pulls the coil… and the cone moves with it.

For the note A, the cone moves 440 times a second (440 Hz)! 🎵
The cone squeezes the air into waves — and your ear hears them. 👂

Read the voiceover (transcript)
  1. How does a speaker turn electricity into sound?
  2. Inside: a magnet, a coil of wire, and a paper cone!
  3. Current in the coil makes it a magnet too.
  4. Flip the current: push, pull, push, pull!
  5. Guess how fast it moves for this note?
  6. Four hundred forty times a second!
  7. The cone pushes air, and your ear hears it!
  8. Next: how does the internet travel through glass? Follow for more!

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