Hello all. I recently completed my ht(at least for now) and I was wondering about noise cancellation. I live in a duplex and there is only one bedroom of ours that is connected to our neighbor's house. Since I like to crank my movies, I am afraid that the sound might travel through the wall and disturb them. So my questions: 1. Could waves be played out of phase through big speakers in the bedroom that connects to the neighbor's, therby reducing or elminating noise from the ht? 2. I know that the "out of phase waves" need to be the same as the "in phase waves" of the offending noise to effectivly cancel them, but would playing in and out of phase waves at least reduce noise in the adjoining bedroom? 3. If that (reducing or eliminating the sound from the ht) is possible, how would I go about doing it? Thanks for the insightful responses.