Flicker noise

Flicker noise ( flicker noise , 1 / f noise , sometimes pink noise in the narrow applied sense of this term) - electronic noise observed in almost any analog electronic device; its sources may be inhomogeneities in a conducting medium, generation and recombination of charge carriers in transistors, etc. Usually referred to in connection with direct current.

Flicker noise has a pink noise spectrum, which is why it is sometimes called that. However, pink noise should be distinguished as a mathematical model of a certain type of signal, and flicker noise as a very specific phenomenon in electrical circuits.

In 1996, V.P. Koverda and V.N. Skokov at the Institute of Thermophysics of the Ural Branch of the Russian Academy of Sciences experimentally discovered intense thermal pulsations during the transition from the bubble mode of boiling liquid nitrogen to the film mode in the thermal section of a high-temperature superconductor. The spectrum of these pulsations corresponds to flicker noise ^[1] .

It manifests itself usually at low frequencies, while at high it is usually overshadowed by white noise .