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Project title Material density and sound transmission Featured science projectScience project video
Difficulty Level High school
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This experiment was performed to find out how the density of a particular type of material will affect the amount of sound transmitted through the material. The experiment was done to compare the sound transmission between plywood, bakelite, glass and marble 

Instructions preview
1. For this experiment, the independent variable is the type of medium used as sound barrier. The dependent variable is the noise level outside the box measured using a decibel meter. The constants (control variables) are the size of the plywood box, the source of the sound and the distance of the decibel meter from the box. 2. One plywood box is made in the workshop or ordered from the local carpenter. For this experiment the size of 300mm x 300mm x 300mm is proposed but other dimensions can also be used. The top cover of the box should .....
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