For example, here in the Hoh Valley, away from the water sounds, the natural quiet is typically around 25 to 35 dBA. On paper this hardly looks quiet, but to most ears it will sound stone silent at first. Only after a period of minutes will small textures appear, typically the subtle sound of distant wind playing high in the forest canopy.

Gordon Hempton, John Grossmann, One Square Inch of Silence-…, loc. 114