During this lesson we create an experiment to find out which material was the best at muffling sound. We chose a tube, then a material and put the material in the tube. After that, we spoke at a normal talking level through the tube and rated the material based on how good it was at muffling. To keep it a fair test, we kept the tube the tube the same, spoke at the same volume each time and used the same size piece of material each time.
As an extra challenge, we then changed the tube and carried out the test again. it was interesting to see how the results differed! Look in our books to read the results and conclusions.
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