Tunnel transmitter

Okay, imagine you're playing hide and seek with your friends, but instead of looking for each other outside, you all go inside a big, long tunnel. The tunnel is like a big straw that goes from one end to the other and you can't see what's on the other side because it's so dark.

Now, imagine you want to talk to one of your friends who's all the way at the other end of the tunnel. You could try shouting really loudly, but they probably wouldn't hear you because the tunnel is so long and the sound might get lost or muffled.

That's where a tunnel transmitter comes in. It's like a special phone that you can use to talk to your friend all the way at the other end of the tunnel. The transmitter sends your voice through a special signal (kind of like a secret code) that travels really far and goes through the walls of the tunnel without losing too much of its strength.

So when your friend gets your message, it's like they're hearing your voice through a magical tube that connects you both. It's really cool! And that's how a tunnel transmitter works.