How does your ear tell a high note from a low note?

A song pours into your ear all at once — squeaky highs, rumbly lows, all mixed together in the air. Yet you hear each note as its own thing. So how does your ear pull them apart? Let's look inside and find out.

1Two things to know first

Pitch is a speed — and your ear has a strip that shakes

You only need two ideas. Watch each one:

A high note wiggles fast

Sound is a wiggle in the air. A high note wiggles super fast. A low note wiggles slow. That speed is what we call its pitch.

A curled strip can shake

Coiled inside your ear is a tiny ribbon — a "listening strip." It can shake when sound reaches it. And here's the trick: different parts are built to shake at different speeds.

2Two ways it COULD work

One big ear, or a row of little ears?

Before we peek, here are two ways your ear could be built. Only one is true — which do you think it is?

Idea 1

One big ear

The whole strip shakes the same for every note. Sound is just one mixed lump, loud or quiet.

Idea 2

A row of little ears

Each note shakes its own spot — fast notes one end, slow notes the other. A place for every pitch.

3Your turn — play a note

Uncoil the strip and slide the pitch around

Here's the curled strip stretched out straight. Slide from low to high and watch where the shaking lands — and which nerve below lights up. One control, one question: does the spot move?

The listening strip (uncoiled)

◀ low notes shake herehigh notes shake here ▶

4Now flatten a spot

Tap to deaden the high-note end 🤚

Tap the strip on the high-note end to flatten it — that patch can't shake anymore. Then play a high note and a low note. Guess what happens first, then run it.

Guess before you tap

You flatten just the spot where high notes shake, then play a high note and a low note. What do you hear?