I had a problem with noisy neighbors in the adjacent room, who started making noise in their room daily at 5:30 a.m., at 6:45 a.m. in the public corridor, when they came back to the room at 10:30 p.m., and till they went to sleep at about 11:00 p.m.
It sounded like there were two moms and their kids. The kids sounded like elementary school age. There was no control over the noise - whether while in their room or out in the hallway. Like you, I could hear much of their conversation and knew a couple of the kids’s names, after one day.
If you will be there for at least a few more days, let the front desk know about your problem. They will offer you a room change and/or let your neighbors know they need to be more quiet. If the guests still don’t comply, they will be given a final warning. Security can verify extreme noise levels, especially at times when many are trying to sleep, by merely standing outside the door. If they hear loud noise levels, they will knock on the door to give the guests a warning.
BTW, the BC rooms have the same lack of soundproofing as the YC rooms.
The CMs will try to resolve your problem, but you have to let them know about the issue. If you just call the “front desk” on the room phone, you will reach a call center. They will assist, but speaking directly to someone at the actual front desk will produce an immediate response.