Characteristics
Like much of modern and contemporary art, noise music takes characteristics of the perceived negative traits of noise mentioned below and uses them in aesthetic and imaginative ways.
In common use, the word noise means unwanted sound or noise pollution. 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. Noise can block, distort, or change the meaning of a message in both human and electronic communication. White noise is a random signal (or process) with a flat power spectral density. In other words, the signal contains equal power within a fixed bandwidth at any center frequency. White noise is considered analogous to white light which contains all frequencies.
In much the same way the early modernists were inspired by naïve art, some contemporary digital art noise musicians are excited by the archaic audio technologies such as wire-recorders, the 8-track cartridge, and vinyl records. Many artists not only build their own noise-generating devices, but even their own specialized recording equipment and custom software (for example, the C++ software used in creating the viral symphOny by Joseph Nechvatal).
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