White noise (slang)
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The term white noise, the 'sh' noise produced by a signal containing all audible frequencies of vibration, is sometimes used as slang (or a neologism) to describe a meaningless commotion or chatter that masks or obliterates underlying information.
The information itself may have characteristics that achieve this effect without the need to introducing a masking layer. A common example of this usage is a politician including more information than needed to mask a point he doesn't want noticed.
"White noise" in the media
The novel White Noise by Don DeLillo explores several themes that emerged during the mid-to-late twentieth century. The title is a metaphor pointing 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.