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Material density and the transmission of soundFeatured science projectScience project video

Observation

The higher density materials (glass and marble) were the most effective at insulating noise and the lowest density material (plywood) was the least effective at insulating noise.

Source of sound

Density (kg/m3)

Noise level (dB) of siren measured outside the box

Noise outside box with the siren inside the box

Plywood

600

72

62

Bakelite

1250

72

54

Glass

2690

72

42

Marble tile

2560

72

44

The chart below represents the results of our science project experiment.

material density and sound transmission experimemt

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Complexity level:
9
Project cost ($):
80
Time required:
2 days to prepare, 1 hour for the science project experiment
Material availability:
Hardware store or home depot
Safety concerns:

Handle breakable/heavy materials carefully. Ensure that you wear protective gloves.