Sound Barrier

Overview

Objectives/Goals Which material (paper egg carton, styrofoam egg carton, standard house insulation) absorbs sound more efficiently. I believe the styrofoam egg carton along with the house insulation will be the most efficient. Methods/Materials Using boxes measuring 17"x22"x22" I compared each material (paper egg carton, styrofoam egg carton and house insulation) by themselves then added house insulation to the two egg carton boxes. With speakers inside the sealed boxes I played music while recording the highest reading on the decibel meter. Results After comparing each material alone and with the added insulation, the styrofoam lined with the insulation gave the lowest reading on the decibel meter. Conclusions/Discussion The results supported my hypothesis. Egg cartons have been used for sound barriers because the different angles redirect sound. Styrofoam along with house insulation works better then paper, because the dead air space absorbs sound more efficiently than the more solid materials (like the paper). My prject concludes that if you have a sound problem you should use styrofoam egg cartons along with your house insulation to eat up unwanted sound.

Competition history

• CSEF 2004 Materials Science (Junior Division Only) · Entry J1103

Resources

• CSEF project summary ↗

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