1. Also called white sound. a steady, unvarying, unobtrusive sound, as an electronically produced drone or the sound of rain, used to mask or obliterate unwanted sounds.
2. Physics. random noise with a uniform frequency spectrum over a wide range of frequencies.
From WHITE NOISE by Don DeLillo (The book I'm currently reading). Metaphor referring to the confluence of all the symptoms of postmodern culture that in their coming-together make it very difficult for an individual to actualize his or her ideas and personality.
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