# Category:Noise

Unwanted or unintentional interference in a signal

## Subcategories

**1f noise**- also known as pink noise, a signal with a frequency spectrum such that the power spectral density is inversely proportional to the frequency**Additive noise**- white noise added to a given signal**Colored noise**- random noise that has certain characteristic statistical properties corresponding to different mappings from a source of randomness**Gaussian noise**- statistical noise that has its probability density function equal to that of the normal or Gaussian distribution**Laser noise**- fluctuations of various parameters of laser output**Noise cancellation**or active noise control, the use of a speaker with the same amplitude but an inverted phase to an original sound**Phase noise**- noise of the optical phase of a beam or electric signal**Signal to noise ratio**- a measure of the level of a desired signal relative to the level of background noise**Superconducting device noise**- devices using superconductiing material that transmit very low noise levels

## Subcategories

This category has the following 9 subcategories, out of 9 total.

## Pages in category "Noise"

The following 19 pages are in this category, out of 19 total.

## Media in category "Noise"

This category contains only the following file.