Why does a tighter guitar string sound higher?

Have you ever stretched a rubber band between your fingers and plucked it? Twang! Pull it a little tighter, pluck it again, and the twang sounds higher.

A guitar string does the same thing. Guitar players turn small knobs at the top of the guitar to make each string tighter or looser. So why does a tighter string sound higher?

When a player plucks a string, the string swings away from the middle and springs back past it, over and over. Now the string starts to vibrate, which means it shakes back and forth super fast. That is why a plucked string looks like a blur.

Each time the string swings, it gives the air around it a tiny push. The pushes travel through the air like ripples on a pond, all the way to your ears. That is how you hear the guitar.

Every sound has a pitch, which means how high or low it sounds. A string that vibrates faster sends more pushes to your ears each second. More pushes each second give you a higher pitch.

Now let's think about a tight string. When the player pulls a tight string to the side, it tugs back toward the middle very hard, like a stretched rubber band snapping back. What do you think that hard tug does to the way the string shakes?

It makes the string shake faster! The strong tug whips the string back to the middle quickly, so it swings across many more times every second. A tight string vibrates faster, and it sings with a higher pitch.

A loose string tugs back gently, so it swings slowly and lazily. Fewer pushes reach your ears each second, and you hear a low, deep pitch.

Let's remember our two words: vibrate and pitch. A tighter string tugs back harder, so it vibrates faster, and faster shaking makes a higher pitch.

Goodnight, and may your dreams be full of soft, happy music.