It's not clean outside, so be quiet inside. You can discuss it with your classmates and make a rest schedule together. Everyone must keep quiet then. Secondly, adjust your heart, calm down and you can fall asleep. The most important thing is to relax. Don't always think about others making noise in your ear. The more you pay attention, the more you feel. You can drink hot milk before going to bed. Take a hot bath and lie in bed without thinking about shrimp. Or unconsciously count sheep or other animals or women. Or listen to music. If not, go out to exercise, sweat, come back and take a bath, and fall asleep in bed.