Advise him to keep his voice down, or play it when you are away, or only for a few time periods a day. After all, it is a public area.
If it is normal to play loudly frequently, it is suggested to consider changing the environment.
When I was in college, I moved out to live alone because I couldn't stand my roommates playing games and making noise. In my senior year, I moved back to school and lived in a dormitory with 7/8 people. Maybe because I have to leave, some differences in my life are acceptable. Everyone will play music loudly occasionally, even if they don't like it. Try to be tolerant. The environment cannot be satisfactory everywhere.