How Does DCTV Science | How a Loudspeaker Works by Electromagnetism Work?

A loudspeaker turns sound into vibrations using a special kind of magnet called an electromagnet.

Imagine you're holding a toy car that can move forward and backward when you press a button, that’s like what happens inside a speaker. The electromagnet is like the button: it moves back and forth very quickly, pushing on a cone (like the front of the speaker), which then pushes air around it, making sound.

Inside the speaker, there's a coil, imagine a spring made of wire, wrapped around a magnet. When electricity flows through the coil, it becomes an electromagnet, and that makes it either push or pull on the magnet next to it. This motion causes the cone to move, just like your toy car moving when you press the button.

Every time the cone moves forward or backward, it pushes air, like blowing a whistle or waving a flag in the wind. These pushes and pulls happen really fast, many times every second, and that’s how we hear sound coming out of the speaker!