Use earplugs or a noise machine. Either of these are effective against noise that disturbs your sleep and work habits.
Important qualities when considering ear plugs are comfort, how long they last, and how easily they can be cleaned or replaced.
Machines that produce white noise are recommended for their effectiveness. Low drones, the sound of moving water, or other background elements block out unwanted sounds.
Distract yourself with music. Consider playing music on your computer or boom box while you work to create pleasant background sound. If you prefer to listen to your tunes on a portable music player, you may want to also purchase noise-canceling headphones. These devices create "anti-noise" as the music plays, blocking out other sound. They also let you listen to songs at lower volumes, which can help preserve your hearing.
Discuss your concerns with your neighbors. In a dorm environment, the pressure of studying and working hard can frazzle everyone. Inform fellow residents that standard quiet hours would improve college life for all. If possible, designate occasions when noise is allowed in the dorm, such as on weekends. A period of rambunctiousness may convince others to agree to quiet time during the week.
Consult your dorm staff. If you've talked about high noise levels with your dorm mates, yet the noise continues, you have a right to complain. An RA can take extra measures to make certain that the quiet time you need is respected.