There is an old clipboard under my work desk at home. It has a good number of blank sheets clipped on. Whenever the ceiling fan is turned on, they are blown about and make a steady flapping sound.
The sheets make the flapping sound all night.
I could place some kind of paperweight on it and keep the sheets from making that sound. But I don’t.
Because if I did put an end to the flapping sound, and there was still a flapping sound in the darkness of my room in the middle of the night, I would have nothing to blame it on.