Overtone

Have you ever heard a sound that seems to have another sound hiding inside of it? That's called an overtone! When you speak or sing, your voice creates vibrations that produce sound waves.

But sometimes those vibrations can make other sounds too - they're called overtones. Imagine you're playing with a toy car that makes a high-pitched sound when you push it. That sound has overtones that are even higher than the original sound.

It's like when you pluck a guitar string. You hear the string's normal sound (called the fundamental) but you also hear other sounds that vibrate with the string (called overtones). Each of these vibrations creates a different sound frequency, making the guitar sound really unique.

Overall, overtones are the different sounds that can be heard when something makes a sound. They make the original sound more interesting and give it different characteristics.