MAKE A HARMONICA
1. What is sound?
Sound is the energy produced by vibration. When you bang a drum, the boom sound comes from the drum surface vibrating at very high speed – so fast you can’t even always see it move!
The vibration carries through the air and into your ear. Once your eardrum starts to vibrate, the brain interprets that vibration as sound.
The vibration carries through the air and into your ear. Once your eardrum starts to vibrate, the brain interprets that vibration as sound.
2. Supplies Needed
1 fat rubber band
2 popsicle sticks
2 skinny rubber bands
2 pieces of straw
1 fat rubber band
2 popsicle sticks
2 skinny rubber bands
2 pieces of straw
3. Follow the video to see how to make your harmonica.
When you blow into your harmonica, the straws and rubber bands start to vibrate from the force of your breath, causing the sound you hear.
4. Investigate- be a scientist
What happens when you move the straws closer together?
What if you pinch the sticks together with your lips or fingers just a little bit?
What if you pinch the sticks together with your lips or fingers just a little bit?
5. Let's Play