Dirac comb

Imagine you have a tiny magic wand that can make a very long line of dots, like when you draw with a pencil. You keep making dots on this line, but you only make them in certain places that are evenly spaced out.

Now, let's say these dots represent sound waves, like the ones you hear when someone speaks or a bird chirps. When you look at the dots, they look like they're repeating over and over again.

This repeating pattern is called a "Dirac comb." It's like a pattern made out of toothpicks, where each toothpick is the same distance apart from the others.

So when we talk about a Dirac comb of sound waves, we mean a pattern of sound waves that are all evenly spaced apart. This can be important when studying sound and waves, because it helps us understand how they behave in different situations.