The hypothesis is that higher density materials will transmit less sound.

You will measure the sound transmission of different materials by using a decibel meter to measure the noise level outside a box with a sound source inside.

You will need a decibel meter, a battery operated siren, a 300mm x 300mm x 300mm plywood box with slots carved into its side, a 250mm x 250mm sheet of plywood of 5mm thickness, a 250mm x 250mm sheet of bakelite of 5mm thickness, a 250mm x 250mm sheet of glass of 5mm thickness, a 250mm x 250mm marble tile of 5mm thickness, and a ruler.

The results of the experiment showed that higher density materials were the most effective at insulating noise and the lowest density material was the least effective at insulating noise. This proves that the hypothesis is true.

This science project is interesting because it shows how sound travels differently through different materials.

To improve the reliability and accuracy of the results, a larger sample of participants should be used. This science project may also be repeated, this time, comparing different elastic materials like rubber, metal, etc.

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!