Do Acoustic Tiles Really Block Sound?

Overview

Objectives/Goals With this experiment I tried to ascertain whether or not acoustic tiles really blocked out sound waves as they advertised. Methods/Materials The materials I tested were: Pinewood Fiberglass Armstrong 755 Acoustic Tile Armstrong 933 Acoustic Tile Styrofoam I put on the constant beep song on 100% volume on my computer then I inserted the various insulations via the top slot of the box. I then inserted the decibel meter into the hole in the front and gradually turned down the computer volume until the decibel meter stopped picking up sound. Then I put the computer volume when the decibel meter stopped picking up sound in my journal and I repeated until I tested every acoustic material multiple times. Results The following list says when each acoustic material stopped picking up sound from the computer: Pinewood - 90% Fiberglass - 62% Armstrong 755 Acoustic Tile - 58% Armstrong 933 Acoustic Tile - 49% Styrofoam - 31% Control (nothing) - 15% Conclusions/Discussion In conclusion my hypothesis was incorrect because I thought that the Armstrong 933 acoustic tile would have blocked out the most sound but the pinewood blocked out the most sound by far.

Competition history

• CSEF 2004 Physics & Astronomy · Entry J1532

Resources

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