Noise
From The Art and Popular Culture Encyclopedia
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In common use the word noise means unwanted sound. 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 not being used to transmit a signal, but is simply produced as an unwanted by-product of other activities. In information theory, however, noise is still considered to be information. In a broader sense, film grain or even advertisements in web pages can be considered noise.
Noise can block, distort, or change the meaning of a message in both human and electronic communication.
See also
- Signal-to-noise ratio
- Art of Noise
- The Art of Noises
- Background noise
- Noise music
- Noise pollution
- Silence
