What is "noise"

background \back"ground`\, n. [Back, a. + ground.]

1. Ground in the rear or behind, or in the distance, as opposed to the foreground, or the ground in front.

2. (Paint.) The space which is behind and subordinate to a portrait or group of figures.

   Note: The distance in a picture is usually divided into foreground, middle distance, and background.
   --Fairholt.

3. Anything behind, serving as a foil; as, the statue had a background of red hangings.

4. A place in obscurity or retirement, or out of sight.

   I fancy there was a background of grinding and waiting before Miss Torry could produce this highly finished . . . performance.
   --Mrs. Alexander.

   A husband somewhere in the background.
   --Thackeray.

5. The set of conditions within which an action takes place, including the social and physical conditions as well as the psychological states of the participants; as, within the background of the massive budget deficits of the 1980's, new spending programs had little chance of passage by the congress.

6. The set of conditions that precede and affect an action, such as the social and historical precedents for the event, as well as the general background[5]; as, against the background of their expulsion by the Serbs, the desire of Kosovars for vengeance is understandable though regrettable.

7. (Science) The signals that may be detected by a measurement which are not due to the phenomenon being studied, and tend to make the measurement uncertain to a greater or lesser degree. Specifically: (Physics) Electronic noise present in a system using electronic measuring instrument or in a telecommunications system, which may hide and which must be differentiated from the desired signal; also called background noise or noise.

8. (Journalism) An agreement between a journalist and an interviewee that the name of the interviewee will not be quoted in any publication, although the substance of the remarks may be reported; -- often used in the phrase ``on background''. Compare deep background.

   To place in the background, to make of little consequence.

   To keep in the background, to remain unobtrusive, inconspicuous or out of sight; -- of people.

   deep background, (Journalism) the status of an interview which must not be quoted in a publication, even without attribution. Compare background[8].

early 13c., "loud outcry, clamor, shouting," from Old French noise "din, disturbance, uproar, brawl" (11c., in modern French only in phrase chercher noise "to pick a quarrel"), also "rumor, report, news," apparently from Latin nausea "disgust, annoyance, discomfort," literally "seasickness" (see nausea).\n

\nAnother theory traces the Old French word to Latin noxia "hurting, injury, damage." OED considers that "the sense of the word is against both suggestions," but nausea could have developed a sense in Vulgar Latin of "unpleasant situation, noise, quarrel" (compare Old Provençal nauza "noise, quarrel"). Meaning "loud or unpleasant sound" is from c.1300. Replaced native gedyn (see din).

late 14c., "to praise; to talk loudly about," from noise (n.). Related: Noised; noising.

n. Various sounds, usually unwanted. vb. 1 (context intransitive English) To make a noise; to sound. 2 (context transitive English) To spread news of; to spread as rumor or gossip.

v. emit a noise [syn: make noise, resound]

1. n. sound of any kind (especially unintelligible or dissonant sound); "he enjoyed the street noises"; "they heard indistinct noises of people talking"; "during the firework display that ended the gala the noise reached 98 decibels"

2. the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience; "modern music is just noise to me" [syn: dissonance, racket]

3. electrical or acoustic activity that can disturb communication [syn: interference, disturbance]

4. a loud outcry of protest or complaint; "the announcement of the election recount caused a lot of noise"; "whatever it was he didn't like it and he was going to let them know by making as loud a noise as he could"

5. incomprehensibility resulting from irrelevant information or meaningless facts or remarks; "all the noise in his speech concealed the fact that he didn't have anything to say"

6. the quality of lacking any predictable order or plan [syn: randomness, haphazardness, stochasticity]

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. The book also includes Blame, a one-shot prototype for Blame!, which originally debuted in 1995.

Acoustic noise is any sound in the acoustic domain, either deliberate (music, speech, etc.) or unintended. It is important to recognise that the term "noise" is also used to refer to other, non-audible forms, especially in electronics and in the radio/radar spectrum.

Noise is the fourth album of the London-based trip hop band Archive.

Noise is a 2007 Australian drama-thriller film written and directed by director Matthew Saville. The film stars Brendan Cowell, Henry Nixon, Luke Elliot, Katie Wall, Maia Thomas and Nicholas Bell.

Noise is a variety of sound, usually meaning any unwanted sound.

Noise may also refer to:

is a video game development company that works in partnership with Nintendo, developing games for the Custom Robo series.

Economic noise, or simply noise, describes a theory of pricing developed by Fischer Black. Black describes noise as the opposite of information: hype, inaccurate ideas, and inaccurate data. His theory states that noise is everywhere in the economy and we can rarely tell the difference between it and information.

Noise has two broad implications.

• It allows speculative trading to occur (see below).
• It is indicative of market inefficiency.

Loudon and Della Bitta (1988) refer to noise as “a type of disruption in the communication process” and go further stating that "each state of the communication process is susceptible to (this) message distortion." (As cited in Wu & Newell, 2003). Therefore we can say that noise is a distruption withing the communication process and can be found in all forms within the communication process.

Some examples of noise could be distortion of a television advertisement or interference of a radio broadcast. This therefore would mean that your reception of the information could be misunderstood as your reception of the information has been interfered with, meaning you may not receive the message in the way the sender is implying. Another, and probably more likely, example of noise is whilst an ad break is occurring on television, the reception of the ad has been interrupted by your mobile phone, meaning you do not fully and clearly receive and decode the information the advertisement is trying to deliver.

What also must be considered when looking at the idea of noise is the understanding that the more the sender and receiver have in common, the less likely it will be for noise to have an effect on the encoding of the message. For example if the receiver did not understand a symbol or the symbol had a different meaning to the receiver then it did to the sender, this would mean the receiver could encode the message in a different way to how the sender had intended.

Noise, in analog video and television, is a random dot pixel pattern of static displayed when no transmission signal is obtained by the antenna receiver of television sets and other display devices. The random pattern superimposed on the picture, visible as a random flicker of "dots" or "snow", is the result of electronic noise and radiated electromagnetic noise accidentally picked up by the antenna. This effect is most commonly seen with analog TV sets or blank VHS tapes.

There are many sources of electromagnetic noise which cause the characteristic display patterns of static. Atmospheric sources of noise are the most ubiquitous, and include electromagnetic signals prompted by cosmic microwave background radiation, or more localized radio wave noise from nearby electronic devices.

The display device itself is also a source of noise, due in part to thermal noise produced by the inner electronics. Most of this noise comes from the first transistor the antenna is attached to.

UK viewers used to see "snow" on black after sign-off, instead of "bugs" on white, a purely technical artifact due to old 405-line British senders using positive rather than the negative video modulation used in Canada, the U.S., and (currently) the UK as well. Since one impression of the "snow" is of fast-flickering black bugs on a white background, in Sweden and Denmark the phenomenon is often called myrornas krig in Swedish, myrekrig in Danish, hangyák háborúja in Hungarian, and semut bertengkar in Indonesian, which translate to "war of the ants" or sometimes hangyafoci in Hungarian which means "ant soccer", and in Romanian, purici, which translates into "fleas".

Due to the algorithmic functioning of a digital television set's electronic circuitry and the inherent quantization of its screen, the "snow" seen on digital TV is less random. Most modern televisions automatically change to a blue screen or turn to standby after some time if static is present.

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. If no noise were picked up with radio signals, even weak transmissions could be received at virtually any distance by making a radio receiver that was sensitive enough. In practice, this doesn't work, and a point is reached where the only way to extend the range of a transmission is to increase the transmitter power.

Thermal noise can be made lower by cooling the circuits, but this is only usually worthwhile on radio telescopes. In other applications the limiting noise source depends on the frequency range in use. At low frequencies ( longwave or mediumwave) and at high frequencies ( shortwave), interference caused by lightning or by nearby electrical impulses in electrical switches, motors, vehicle ignition circuits, computers, and other man-made sources tends to swamp transmissions with thermal noise. These noises are often referred to as static. Atmospheric noise is radio noise caused by natural atmospheric processes, primarily lightning discharges in thunderstorms. At very high frequency and ultra high frequency these sources can still be important, but at a much lower level, such that thermal noise is usually the limiting factor. Cosmic background noise is experienced at frequencies above about 15 MHz when highly directional antennas are pointed toward the sun or to certain other regions of the sky such as the center of the Milky Way Galaxy.

Electromagnetic noise can interfere with electronic equipment in general, causing malfunction, and in recent years standards have been laid down for the levels of electromagnetic radiation that electronic equipment is permitted to radiate. These standards are aimed at ensuring what is referred to as electromagnetic compatibility, or EMC.

was 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. After broadcasting three anime series, the block was cancelled on favor of extending noitaminA which started airing two productions at once instead of only one.

Noise in audio, recording, and broadcast systems refers to the residual low-level sound (usually hiss and hum) that is heard in quiet periods of a program.

In audio engineering it can refer either to the acoustic noise from loudspeakers or to the unwanted residual electronic noise signal that gives rise to acoustic noise heard as 'hiss'. This signal noise is commonly measured using A-weighting or ITU-R 468 weighting

Noise is often generated deliberately and used as a test signal. Two types of deliberately generated noise in common use are referred to as ' white noise', which has a uniform spectral power density at all frequencies, or ' pink noise' which has a power spectral density that falls at 3dB/octave with rising frequency. The latter is often more useful in audio testing because it contains constant energy per octave (and hence per commonly used 1/3 octave), rather than a preponderance of energy at high frequencies. In other words,it contains energy that is distributed geometrically rather than linearly.

In electronics, 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. Thermal noise is unavoidable at non-zero temperature (see fluctuation-dissipation theorem), while other types depend mostly on device type (such as shot noise, which needs steep potential barrier) or manufacturing quality and semiconductor defects, such as conductance fluctuations, including 1/f noise.

In communication systems, noise is an error or undesired random disturbance of a useful information signal in a communication channel. The noise is a summation of unwanted or disturbing energy from natural and sometimes man-made sources. Noise is, however, typically distinguished from interference, for example in the signal-to-noise ratio (SNR), signal-to-interference ratio (SIR) and signal-to-noise plus interference ratio (SNIR) measures. Noise is also typically distinguished from distortion, which is an unwanted systematic alteration of the signal waveform by the communication equipment, for example in the signal-to-noise and distortion ratio (SINAD).

While noise is generally unwanted, it can serve a useful purpose in some applications, such as random number generation or dither.

Noise is a comedy drama film written and directed by Henry Bean. It stars Tim Robbins and Bridget Moynahan. Robbins plays a successful lawyer in Manhattan named David Owen who is bothered by all the noise in the city, and who resorts to vandalism to put a stop to it, adopting the identity of "The Rectifier". His acts of vandalism provoke the mayor of the city, played by William Hurt.

The film premiered October 22, 2007 at the Rome Film Festival. It was later shown at the AFI Film Festival on November 6, 2007. It opened in limited release in the United States on May 9, 2008.

In signal processing, noise is a general term for unwanted (and, in general, unknown) modifications that a signal may suffer during capture, storage, transmission, processing, or conversion.

Vyacheslav Tuzlukov (2010), Signal Processing Noise, Electrical Engineering and Applied Signal Processing Series, CRC Press. 688 pages. ISBN 9781420041118

Sometimes the word is also used to mean signals that are random (unpredictable) and carry no useful information; even if they are not interfering with other signals or may have been introduced intentionally, as in comfort noise.

Noise reduction, the recovery of the original signal from the noise-corrupted one, is a very common goal in the design of signal processing systems, especially filters. The mathematical limits for noise removal are set by information theory, namely the Nyquist–Shannon sampling theorem.

"Noise" is a song co-written and recorded by American country music artist Kenny Chesney and written by Ross Copperman, Shane McAnally and Jon Nite. It was released in March 2016 as the first single from Chesney's upcoming seventeenth studio album, Cosmic Hallelujah.

Noise is the nineteenth studio album by Japanese rock band Boris. The Japanese edition of the album was released on 18 June 2014 via Avex Group's sub-label Tearbridge Records and consists of the original album plus other songs previously released on other endeavors, like "Kimi no Yukue" which was used for a promotional video of Chunsoft video game Zero Escape: Virtue's Last Reward in Japan. This is the second Boris album released through a major label (the first one being 2011's New Album, also released by Avex Group/Tearbridge). It was released on 17 June 2014 through Sargent House record label internationally on both CD and double vinyl. A Japanese double vinyl edition was released by Daymare Recordings (without the bonus tracks on the Avex version).

The release date and the covers of the album were announced on April 8, 2014. Along with the announcement, an edit of the track "Quicksilver" was also released for streaming. The band will embark a North American tour in 2014 in the support of the album.

A studio re-recording of "Heavy Rain" appears on their collaborative album with Merzbow, Gensho; its deluxe CD version also features collaborative live performances of this song, "Melody," and "Angel."