Mhamad.
any fan in the room will produce noise. You can lower speeds, turn them off when you broadcast, or replace the ones in a desktop with quite ones (may be a challenge in Egypt, you may need a quick trip to Israel to find some :-)))).
hanging blankets, or like you said, anything, on the walls will reduce most of the noises and echos. covering the ceiling with same will help further. Like Mike said, it is real difficult to filter noise. A gate is a must.
Good luck Habibi.