Another noisy cabin is on Celebrity's M Class, Millenium, Constellation, Summit and Infinity is Inside Cabin 8101.
There is a noise of water rushing through the right side wall of the cabin. There are pipes in those walls even though there is another cabin next to it. I would think they also hear it as well on the left side of that cabin.
We had this cabin on the Constellation where we really heard it at night. On the Millenium it wasn't as bad, but still there.
We asked our cabin attendant and she said it's from the pools and whirlpools.
I'm on the Infinity for a 15-day cruise and I made sure I didn't book it again.