Noise (disambiguation)
Encyclopedia
Noise
Noise
In common use, the word noise means any unwanted sound. In both analog and digital electronics, noise is random unwanted perturbation to a wanted signal; it is called noise as a generalisation of the acoustic noise heard when listening to a weak radio transmission with significant electrical noise...

is unwanted sound or signal.

Noise may also refer different types of interference such as:
  • Noise (audio)
    Noise (audio)
    Noise in audio, recording, and broadcast systems refers to the residual low level sound that is heard in quiet periods of a programme....

    , residual low level "hiss or hum"
  • Noise (video)
    Noise (video)
    Noise, in analog video and television, is a random dot pattern of static displayed when no transmission signal is obtained by the antenna receiver of television set and other display devices...

    , "snow" on video or television pictures
  • Image noise
    Image noise
    Image noise is random variation of brightness or color information in images, and is usually an aspect of electronic noise. It can be produced by the sensor and circuitry of a scanner or digital camera...

    , related to digital photography
  • Noise (electronics)
    Noise (electronics)
    Electronic noise is a random fluctuation in an electrical signal, a characteristic of all electronic circuits. Noise generated by electronic devices varies greatly, as it can be produced by several different effects...

    , related to electronic circuitry
  • Noise (radio)
    Noise (radio)
    In radio reception, noise is the superposition of white noise and other disturbing influences on the signal, caused either by thermal noise and other electronic noise from receiver input circuits or by interference from radiated electromagnetic noise picked up by the receiver's antenna...

    , interference related to radio signals


Noise may also mean:
  • Industrial noise
    Industrial noise
    Industrial noise is usually considered mainly from the point of view of environmental health and safety, rather than nuisance, as sustained exposure can cause permanent hearing damage. Traditionally, occupational noise has been a hazard linked to heavy industries such as ship-building and...

    , hearing damage and industrial hygiene
  • Noise figure
    Noise figure
    Noise figure is a measure of degradation of the signal-to-noise ratio , caused by components in a radio frequency signal chain. The noise figure is defined as the ratio of the output noise power of a device to the portion thereof attributable to thermal noise in the input termination at standard...

    , the ratio of the output noise power to attributable thermal noise
  • Noise spectral density
    Noise spectral density
    In communications, noise spectral density No is the noise power per unit of bandwidth; that is, it is the power spectral density of the noise. It has dimension of power/frequency , whose SI coherent unit is watts per hertz, which is equivalent to watt-seconds or joules...

    , No measured in Watt/Hertz
  • Noise (economic)
    Noise (economic)
    Economic noise, or simply noise, describes a theory of pricing developed by Fischer Black. To Black, noise is the opposite of information. Sometimes it's hype, other times it's inaccurate ideas, other times it's inaccurate data; noise has many forms...

    , relates to a theory of pricing developed by Fischer Black
  • Perlin noise
    Perlin noise
    Perlin noise is a computer-generated visual effect developed by Ken Perlin, who won an Academy Award for its use in the motion picture Tron...

    , artificial pseudo-random noise used for computer graphics effects
  • Statistical noise
    Statistical noise
    Statistical noise is the colloquialism for recognized amounts of unexplained variation in a sample. See errors and residuals in statistics....

    , a colloquialism for recognized amounts of unexplained variation in a sample
  • Noise (probability), a collection of sigma-fields indexed by time intervals, representing information about a "process with independent values"


In arts and culture:
  • Noise (music), a noise-based aesthetic in experimental music and sound art
  • Power noise
    Power noise
    Power noise is a fusion genre among noise music and various styles of electronic dance music. It should not be confused with "power electronics", which lacks rhythmic elements and is closer to harsh noise...

    , a derivative of noise music
  • NOiSE
    NOiSE
    This article is about NOiSE the manga. For other uses, see Noise . is a one volume manga created by Tsutomu Nihei as a prequel to his ten-volume work, Blame!. Noise offers some information concerning the Megastructure's origins and initial size, as well as the origins of Silicon life...

    , a manga by Tsutomu Nihei
  • Noise (Goidelic mythology) or Naoise, a figure in Irish mythology
  • Noise (Archive album)
  • Noise (DecembeRadio album)
    Noise (DecembeRadio album)
    Noise is a praise and worship album by the band DecembeRadio, released independently in 2005.-Track listing:# "Everybody Praise The Lord" – 3:49# "The Noise We Make" – 3:35...

  • Noise (2007 Australian film), a drama written and directed by Matthew Saville
  • Noise (2007 U.S. film), a comedy-drama written and directed by Henry Bean
  • Noise (programming block)
    Noise (programming block)
    is a Fuji TV late night anime programming block, broadcast each Wednesday night from 26:08 to 26:38. It is Fuji TV's second late night anime-themed time block, after noitaminA, which airs every Thursday night. It first began on October 15, 2008, with Michiko to Hatchin.-Programs:...

    , a Fuji TV late-night anime programming block
  • Noise (company)
    Noise (company)
    is a video game development company that works in partnership with Nintendo, developing games for the Custom Robo series.-History:Noise was founded with a staff of 10 people on September 2, 1996 for the original purpose of developing games for PCs...

    , a second-party video game developer for Nintendo
  • Noise (book), a 2006 popular science book by Bart Kosko
    Bart Kosko
    Bart Andrew Kosko is a writer and professor of electrical engineering and law at the University of Southern California...

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