2.)term used by psuedo-erudites to describe the degree of usefulness found in communications by media, individuals or otherwise.
2.)Typically, a demogague actually benefits from non-sensical, contradictory and inflammatory statements and agendas. Ironically, the higher the signal-to-noise ratio, the more effective they become since any useful information would actually reign them in.
People who grow up in empty households (often with a lot of older people) feel as though noise and signal are in direct proportion, which causes them to pump more noise in the hopes of generating more signal.
See also: catharsis