Trombone Straw Sound Science Experiment
Did you know you can make a fun little musical instrument with a straw and bottle of water? In this fun and easy sound science experiment, we’re going to explore and investigate sound by making a trombone out of a straw. You’ll easily create all kinds of fun little noises and different tones with this super cool trombone straw sound science experiment.
- Empty soda bottle
- Fill the bottle about three quarters full with water.
- Put the straw in the bottle and blow across the top of the straw.
- Now lower the straw further into the water and blow across the top.
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How it Works:
As you move the straw up and down inside the bottle, the level of water in the straw changes. This change in water level results in different lengths of air columns in the straw. As you blow across the top of the straw, the column of air in the straw vibrates and creates the sound that you hear. As you adjust the length of the air column, the amount of air vibrating changes and results in a different sound.
Make This A Science Project:
Try different sized straws. Try putting a smaller straw inside a larger straw. Try adding a small hole in the side of the straw.
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