Use a Balloon to Amplify Sound

Small sounds will still create a big noise once you use an honest sound conductor. Experiment with a balloon, compressed air and your own ears to seek out out how it works.

What you'll need:

• Balloon

Instructions:

1. Blow up the balloon.
2. Hold the balloon close to your ear while you tap lightly on the other side.

What's happening?

Despite you only tapping lightly on the balloon your ears can hear the noise loudly. after you blew up the balloon you forced the air molecules within the balloon nearer to each other. as a result of the air molecules within the balloon are nearer along, they become a more robust conductor of sound waves than the ordinary air around you.