The primal chaos of Okeanos is well served by the sound of a stormy sea. When the sea is worked into anger, it possesses equal energy across the entire audible spectrum; it is full-frequencied white noise. Yet the spectrum always seems to be changing; for a moment deep vibrations predominate, then high whistling effects, though neither is ever really absent, and all that changes is their relative intensity. … It is only in a boat that wave motion becomes audible, for the bulkheads groan and shudder violently as the ship rolls and pitches. (By this means I once timed the waves at between 6 and 11 seconds in a gale on the Pacific.)

Schafer, Murray R, The Soundscape- Our Sonic E…, loc. 574