back in the days when I worked for P&O containers all the cabins on the ships had bits of folded paper or cardboard stuck between any joint in the cabin joinery. It would take years of successive occupants to stop the worst rattles and groans.
One cabin even had a broom nailed to a wall panel. you put your work-boots against the broom to apply just the right pressure to stop the panel drumming depending on engine
I remember one Mate joining a ship with his wife. He went out and started the handover while she sorted the cabin. When he finished his wife proudly showed him all the little bits of messy paper she had removed from the ceiling panels
One square rigger I worked on made so much noise
below that the paying crew complained they couldn't sleep (even at anchor). We sent the chippy down with a drill and an oil
can. He drilled a hole in the top of a joint that he thought was making noise and then squirted in a dab of oil
. This would stop that creak for a few weeks. Then he was back on the oilcan, complaining that he was a chippy not a greaser.
Snow Petrel was very quiet, creaking wise, as is Sunburst, unless the babystay is loose they the mast
creaks a lot. I have sailed on a few steel
boats that made some noise, both didn't have much in the way of solid bulkheads.
Two big alloy boats with welded in water
tight bulkheads were very quiet (from a creaking point of view) with the structure feeling very stiff.
Of course on all these boats the water
noise was loud, any blocks banging on deck
were very annoying, and loaded jib sheets
can transmit lots of sound into the cabin, and the pounding could be pretty bad.
The quietest boats seem to be well built traditional wooden boats, they sort of muffle sea noise and even a lot of the deck
noise, the joinery creaking can seem rather pleasant in contrast to the drumming of a monocote boat bashing through a seaway.