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Project title Material density and the transmission of soundFeatured science projectScience project video
Difficulty Level High school
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This science fair project was performed to ascertain how the density of a particular type of material affects the amount of sound transmitted through the material. The science fair project involved comparing the sound transmission characteristics of plywood, bakelite, glass and marble 

Instructions preview
1. For this science fair project, the independent variable is the type of medium used as a 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 sound source and the distance of the decibel meter from the box. 2. Have a carpenter assemble the plywood box for you. For this science project experiment, the size of 300mm x 300mm x 300mm is proposed but other alternative dimensions may be used. The top cover of the box should be removable, .....
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