This week, we have been doing experiments with sound. We added this to our sound science series. Balloon drums are super easy to make. We experiment with how tight the balloon is and what different sounds are made.
You will need
Cups
Balloons
Chopsticks
Scissors and Tapes
What we do
- Cut the neck of the balloon with scissors.
- Stretch the balloon's body on a cup.
- For safety, tape the side of the balloon to the cup to keep it on.
- We use chopsticks as drumsticks, but you can use whatever you can find, pencils, pens, etc.
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What we learn
1. When we tap on the drums, the balloon on the drum vibrates. As the result, the air molecules vibrate against each other, sound waves are formed and the sound of the drums can be heard.
2. We try different sizes of balloon or different tightness of the balloons on the cups. They make different sounds. The tighter the drum skin, the higher pitch it gets.
3. For further experiment, instead of cups, we can try making drums with different containers (cans, coffee tins, etc). Or we can try using different drumsticks, to see if it make the same sound.
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