How the eardrum works.
- A large bowl or pot
- Plastic wrap
- 20-30 grains of uncooked rice
- A cookie sheet
- To make a model of the eardrum, stretch a piece of plastic wrap over your bowl or pot. Make sure the wrap is on there tight. The plastic wrap represents the eardrum.
- Place about 20-30 grains of uncooked rice on the top of the plastic wrap.
- Now you need some noise. Hold the cookie sheet close to the plastic wrap. Hit the cookie sheet to create a "big bang" noise and watch the rice grains jump. Now you know how sound causes your eardrum to vibrate, sending messages to your brain about the sounds you're hearing!
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