I think something effective might be wait until he's trying to sleep at like 2-4am, point your amp at him, and crank it loud as it goes without doing permanent damage. If he complains you couln't get to sleep and a little amplified expression always helps you relax. :) And then do that every night until he gets the hint or stops sleeping.
Or Schmange's ideas, those would probably work just as well.
"If one has realized a truth, that truth is valueless so long as there is lacking the indomitable will to turn this realization into action!"
-A.H.
