I desire to build a box that is sound proof that would be only slightly larger then my head, which I could scream as loud as I possibly could, yet the outside world would barely be able to hear, or not be able to hear at all (as little as possible). I have almost no knowledge of physics (only an intro mechanics class at a community college--I am taking calc based mechanics E&M, and waves next year), and so I did not know where to put this question. Any advice, ideas or information that could be provided to benefit the project are greatly appreciated! The best advice would be what to use, and why to use it, although anything is truly and genuinely appreciated! Thank you! (if anyone would like reasons for the project, I will post, but I did not want to waste peoples energy with potentially undesired, superfluous material).