I live in a small town that is quickly evolving into a suburban nightmare. The (at times) constant revving of glass pack engines, delivery vehicles, garbage trucks, airplanes, train hum and other unwanted noise are about to drive me up the wall. Last night at 11 pm I was trying to fall asleep with a fan producing white noise and wearing earplugs and still I could hear a faint rumble. I am wondering if anyone (especially those living in large cities) have tips for soundproofing the inside of a bedroom from outside noise? Thanks!