Results

Results

Can You Keep That Noise Down?

Text Box: The results for this experiment were surprising. This experiment proved my hypothesis that the most absorptive and thickest insulator is the best material for soundproofing and disproved my hypothesis that the smaller box would have a lesser sound level than the larger box. The sound level of the small box averaged 71 dB while the sound level of the large box averaged 64.5 dB. Comparing the sound level readings for each insulator, the fiberglass insulation (R12) was the most effective soundproofing material, reducing the sound level from my control by 15 dB on the larger box and 21 dB in the smaller box. The next most effective soundproofing material was the 1” corrugated foam, reducing the sound level 14.5 dB in the 16” box and 15 dB in the 10” box. The third most effective material was the 0.5” acoustical ceiling tiles reducing the sound level by 6.5 dB in the 16” box and 8.75 dB in the 10” box. The least effective material was the 1” rigid insulation not reducing the sound level in the 16“ box, but reducing the sound level in the smaller box by 5 dB. See graph

Sound

Did you know…

Galileo showed that the frequency of sound determines the pitch.