Recently moved into the back room as an office/gaming room an its become apparent that theres a fair bit of sound leakage mainly lower end stuff through the wall into the next room. Fine during the day but at night when the person using said room is trying to sleep, its not ideal. Setup is two small bookshelf speakers with 4" woofers one is in a corner near the adjoining wall which I think is causing a fair amount of the problem. I looked online at acoustic tiles but it appears they are more for reducing reverb etc than actually dampening noise. While I know realistically I cant remove all the noise unless I wear a headset. Can anyone suggest anything for a reasonable cost that would at least reduce the perceived sound? Also anything that would reduce the reflections/echo would be amazing as I have next to zero soft surfaces in here so it sounds weird.