This would not be silence, however. It would not be silence because even if we could flee or cancel out our noisome outside environment, we must always carry that environment inside us; and that environment is rich in sound. Our veins and arteries and heart are filled with blood that is of the same salinity as the seas in which our aquatic ancestors floated, and those internal waterways pound and surge like surf on the beach, and we are hardwired to pick up these liquid sounds and frequencies, sounds like my bucket dredge, precisely because we once were fish.

George Michelsen Foy, Zero Decibels, loc. 607