reminds me of a short story.
A professor in a pub tells a story about a student that doesn't pay attention to details in class. This student builds a sound canceling box... He puts it in a concert hall on a performance night. The crowd erupts into applause and there is nothing but silence. The professor explains that the student forgot that energy could not be created or destroyed. The sound had to go somewhere. So this little box was not just canceling the sound, it was "absorbing" it. The box explodes...
Fiction of course but I remember really liking the stories because they always had some different perspective. I read the book years ago and can't remember the title or author?