B24 Cabin ( Baltic Deck) did not have engine room propeller or sea noise. It was not cramped & was light ,airy & pleasant with its 2 portholes.There was a small settee but no fridge. The cabin bulk heads are thin so if you have noisy neighbours you will hear them.
There was noise from hydraulic pumps which serviced the water tight doors .There was also a clanging noise at times which sounded like a non return valve in a pipe line. After all you are on a ship so to expect such things !!