Signal-to-interference ratio

Okay, so let's say you want to listen to music on your radio. But there are a lot of other signals and noise around that can interfere with the music signal. The signal-to-interference ratio is like a measure of how much of the music signal you can hear compared to all the other noise and interference.

Think of it like being in a crowded room, trying to hear your friend talk. If your friend is talking really loud and there isn't much background noise, it's easy to hear them. That means you have a high signal-to-interference ratio. But if there are a bunch of people talking loudly and there's music playing and someone is vacuuming, it's hard to hear your friend at all. That means you have a low signal-to-interference ratio.

So on a radio or wireless device, a high signal-to-interference ratio means you'll get better quality sound or faster internet. And a low signal-to-interference ratio means there will be more interruption or poor quality.