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Why does a whistle make noise?

A whistle makes noise because air inside it shakes back and forth super fast.

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Pip’s answer

  1. A whistle makes noise because air inside it shakes back and forth super fast.
  2. When you blow, air zooms in and hits a sharp edge. Whoosh!
  3. The air flips and wiggles, making sound waves that fly to your ears.
  4. Wow-ee, a tiny whistle can be heard all the way across a big field!

For grown-ups

When you blow into a whistle, air hits a sharp edge and splits, swirling back and forth very quickly. This makes the air vibrate, creating sound waves. Many whistles have a chamber that makes the vibration stronger, and some contain a little ball that makes a trilling sound.

Ask your child: Can you whistle with your lips?

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