I have a project.and need a help .
Mechanical nature of sound.Plan is to design how to dump noise.
I must make online , soundproof box to hold one or more sell phones during the class.
and i have to pay attention on further :
1.Consistently justifies design, features ..of the box ( materials , shape ...)
2.Outlines how sufficient , relevant data will be collected.
3.Comprehensively explain the application of science, principles.
I can use , wooden box and fill the sides with a foam
or I can use wooden box and fill the sides with a foam , and cover the box with a foam
and third option is tape over the wooden box with a foam,
Which option is the best , can you te