ELI5: Explain Like I'm 5

Carrier-to-noise ratio

Okay kiddo, you know how sometimes it's hard to hear someone on the phone when you're in a noisy place? That's because there's a lot of noise around you and it's interfering with the sound of the person's voice.

Well, carrier-to-noise ratio is kind of like that but with radios instead of phones. When you listen to the radio, there's a signal that carries the music or talk show or whatever you're listening to. That signal is called the carrier.

But just like with the phone, there can be a lot of noise that interferes with the carrier signal. This noise can come from things like other radio signals, electrical equipment, or even the sun.

The carrier-to-noise ratio is a way to measure how strong the carrier signal is compared to all that noise. If the carrier is really strong and the noise is really weak, you'll be able to hear the radio station clearly. But if the noise is too strong and the carrier is too weak, the station might be hard to hear or you might not be able to pick it up at all.

So, the higher the carrier-to-noise ratio, the better your radio reception will be. And that's why engineers and scientists pay attention to it when they're working with radios and other types of communication equipment.