I think it should be pointed out that there are acceptable (unavoidable) sounds and there are unacceptable sounds. Slapping, banging, pinging of anything on deck should be chased down and stopped, if not for one's own comfort then as a courtesy to others. Wind generators should also be shut down at night in marinas, and generators shut off everywhere unless absolutely alone. OTOH the normal whistling is unavoidable. Except that when buying a boat one might choose to avoid in-mast roller furling as they can make a very loud whistling sound that drives me crazy.
When I first got my current boat I stayed aboard for a few days (ashore in the boatyard) to get her prepped for the trip home - the first night a gale blew......lying in my bunk I could hear sounds that made me think the boat was about to fall apart (creaks & groans from all around - and well above the usual). If I had been offshore I would have been somewhat worried........
.......after an hour or so of thinking I twigged that it was due to the webbing jacklines strumming on the deck - sending the noise through the hull (and deck).
Perhaps a bit of thread drift here but somewhat related:
I've tried a couple of different designs of bungees over the years and have not been overly thrilled with the life span of them when exposed to the elements. Is there a style that seems to work better for you?
I have several pieces of misc small diameter line around for various duties that work about as well as bungees. But, sometimes it's nice to have the stretch and/or the built in hooks.
If you are talking about the bungee cords like shown below - the sun's UV eats at the rubber threads inside and they fail in a few months.
you can get significantly increased life by coating them with SPF 40 Sunscreen Lotion. Just put it on the cover like you would put it on yourself.
When I was a boy my momma would send me down to the corner store with $1 and I would come back with 5 potatoes, 2 loaves of bread, 3 bottles of milk, a hunk of cheese, a box of tea and 6 eggs. Can't do that now, too many f**kn security cameras.
if they are guests and only there for one night and are light sleepers? They probably wont sleep.. After a few nights aboard? It wont matter.. they'll sleep, while tied up you can stuff lines with things to reduce banging, (my ex used to use my deck cleaning sponge on the main halyard on nights she would stay aboard)