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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.