1. Earth Science, Sound Barrier !!!!!
Presenting The one, the only....
Earth Science, Sound Barrier !!!!!
By: Addi, Tiffany, Ilias, and Xander

2. Materials Drywall Tape Cardboard Paper towel Tinfoil Plastic Holder
By Xander
Materials
Drywall
Tape
Cardboard
Paper towel
Tinfoil
Plastic Holder
Packing installation

3. By
Tiffany
Final Decibel Record
We did 3 test to get our average. Our final design barrier decibels are :
Without the Barrier: With the Barrier:
81 dB dB
85 dB dB
84 dB dB
Our barrier really improved and the important thing is that it worked !!!!!
We added our result and divided the final from the adden and got:
83dB dB So we lost 14 decibels with the barrier

4. 2nd design Measurements
By ilias
Its Width was 2¨ in.
Its Height was 8¨1/4 in.
And it was 16¨in. Long
: )

5. Pictures…!
Thank you!
: )
By Addi