The walls facing the elevator lobby are, to put it bluntly, the walls behind the toilets / bathroom for 5028/5030.  The entry doors are further from away from the elevator lobby.   Believe me, no sound at all.  I was very relieved.   4th and 6th floors have cabin doors that open facing the forward elevator lobby.  5th does not.  Have not checked 3rd floor yet.  Just reporting what I observe.