The bamboo (rid of Monday's ice) scratches the siding, and the sound this leaves in its wake makes me think of an old-fashioned sailing ship. There is that same sense of being at the mercy of the elements, of the very timbers sighing.
To counteract these harsh noises, though, there is also the purring of the furnace. The colder the night, the more often it's on, of course, and in it, there is the promise of warmth and safety and civilization.