The document describes how sound waves travel through the air and cause the eardrum to vibrate. It compares dropping a water droplet into water and observing the waves to shouting in the air, with sound waves traveling invisibly through the air. A model of the eardrum is proposed to demonstrate how sound waves cause the eardrum to vibrate, moving small pins and allowing the listener to hear.

1. HEARING

2. Dropwaterusingthewaterdropperintothemiddle

3. Watchthewaves in thewaterThisislikeyoushouting in the air.Thisislikeyourvoice travelling in the air

4. Youcannotseethesoundwaves …

5. Butyou can feelthesoundwaves

6. When sound waves touch your eardrum, it vibrates.

7. I can’t imagine itHowdifficult !

8. LET’S MAKE A MODEL OF THE EARDRUM

9. Themusic produces soundwavesthat cause thetovibratewhich causes thepinstomove.