Noise

In common use the word noise means unwanted sound or noise pollution. In broader sense the film grain or even advertisements in web pages can be considered noise. In electronics noise can refer to the electronic signal corresponding to acoustic noise (in an audio system) or the electronic signal corresponding to the (visual) noise commonly seen as 'snow' on a degraded television or video image. In signal processing or computing it can be considered data without meaning; that is, data that is ...