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Noise Top Facts

Deafness, or hearing impairment, is a partial or total inability to hear where the ability would usually be expected.
DeafnessDisabilityNoise pollutionDeaf cultureDeafnessCommunication disorders

Normal distribution
In probability theory, the normal (or Gaussian) distribution is a continuous probability distribution that has a bell-shaped probability density function, known as the Gaussian function or informally the bell curve: The parameter μ is the mean or expectation (location of the peak) and σ is the variance. σ is known as the standard deviation. The distribution with μ = 0 and σ = 1 is called the standard normal distribution or the unit normal distribution.
Normal distributionExponential family distributionsNormal distributionConjugate prior distributionsContinuous distributionsDistributions with conjugate priors

Noise music
Noise music is a category consisting of multiple discrete genres of music that have employed noise as a musical resource. It includes a wide range of musical styles, and sound based creative practices, that feature noise as a primary aspect. It can feature acoustically or electronically generated noise, and both traditional and unconventional musical instruments.
Noise musicNoise music

Noise rock
Noise rock (also known as noise punk) describes a style of post-punk rock music that became prominent in the 1980s. Noise rock makes use of the traditional instrumentation and iconography of rock, but incorporates atonality and especially dissonance, and also frequently discards usual songwriting conventions.
Noise rockPunk genresAmerican noise rock music groupsNoise musicAlternative rock

Art rock
Art rock (alternatively spelled art-rock) is a subgenre of rock music that originated in the United Kingdom in the 1960s, with influences from art, avant-garde, and classical music. The first usage of the term, according to Merriam-Webster Online Dictionary, was in 1968. Influenced by the work of The Beatles, most notably their album Sgt.
Art rockRock music genres

An onomatopoeia or onomatopœia is a word that imitates or suggests the source of the sound that it describes. Onomatopoeia refers to the property of such words. Common occurrences of onomatopoeias include animal noises, such as "oink" or "meow" or "roar" or "chirp".
OnomatopoeiaTypes of wordsGreek loanwordsStyle (fiction)OnomatopoeiaPoetic devices

Cosmic microwave background radiation
In cosmology, cosmic microwave background (CMB) radiation (also CMBR, CBR, MBR, and relic radiation) is thermal radiation filling the observable universe almost uniformly. With a traditional optical telescope, the space between stars and galaxies (the background) is completely dark. However, a sufficiently sensitive radio telescope shows a faint background glow, almost exactly the same in all directions, that is not associated with any star, galaxy, or other object.
Cosmic microwave background radiationAstronomical radio sourcesRadio astronomyPhysical cosmology

Signal-to-noise ratio
Signal-to-noise ratio (often abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined as the ratio of signal power to the noise power. A ratio higher than 1:1 indicates more signal than noise. While SNR is commonly quoted for electrical signals, it can be applied to any form of signal (such as isotope levels in an ice core or biochemical signaling between cells).
Signal-to-noise ratioRadar signal processingMeasurementError measuresNoiseEngineering ratiosElectronics termsDigital audioStatistical ratios

In common use, the word noise means any unwanted sound. In physics and analog electronics, noise is a mostly unwanted random addition to a signal; it is called noise as a generalisation of the acoustic noise ("static") heard when listening to a weak radio transmission with significant electrical noise. Signal noise is heard as acoustic noise if the signal is converted into sound (e.g. , played through a loudspeaker); it manifests as "snow" on a television or video image.

Flatulence is the expulsion through the rectum of a mixture of gases that are byproducts of the digestion process of mammals and other animals. The medical term for the mixture of gases is flatus, informally known as a fart, or simply gas. The gases are expelled from the rectum in a process colloquially referred to as "passing gas", "breaking wind" or "farting". Flatus is brought to the rectum by the same peristaltic process which causes feces to descend from the large intestine.
FlatulenceSymptoms and signs: Digestive system and abdomenReflexesMethaneMedical signsGastroenterologyFlatulence

Fuse TV
Fuse is an American national television network dedicated exclusively to music. It features original series and specials, exclusive interviews, live concerts and video blocks. Fuse accommodates a wide range of musical tastes, while targeting a demographic between 18-34 year-olds. It offers music entertainment not only on-air but also on-line (fusemusic. com), on-demand (Fuse On-Demand), in high-definition (Fuse HD) and via mobile (Fuse mobile).
Fuse TVTelevision channels and stations established in 2003MuchMusicFuse TV

Channel (communications)
In telecommunications and computer networking, a communication channel, or channel, refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel. A channel is used to convey an information signal, for example a digital bit stream, from one or several senders (or transmitters) to one or several receivers.
Channel (communications)Telecommunication theoryInformation theoryTelevision terminology

Electromagnetic interference
Electromagnetic interference (or EMI, also called radio frequency interference or RFI when in high frequency or radio frequency) is disturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source. The disturbance may interrupt, obstruct, or otherwise degrade or limit the effective performance of the circuit. These effects can range from a simple degradation of data to a total loss of data.
Electromagnetic interferenceElectromagnetic compatibilityTelevision terminology

Noise pollution
Noise pollution is excessive, displeasing human, animal, or machine-created environmental noise that disrupts the activity or balance of human or animal life. The word noise may be from the Latin word nauseas, which means disgust or discomfort. The source of most outdoor noise worldwide is mainly construction and transportation systems, including motor vehicle noise, aircraft noise, and rail noise.
Noise pollutionNoise pollutionSounds by typeAudiology

Noise (electronics)
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, 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.
Noise (electronics)NoiseElectronics terms

Laugh track
A laugh track (a.k.a. canned laughter, laughter track, fake laughter) is a separate soundtrack with the artificial sound of audience laughter, made to be inserted into television programming of comedy shows. It was invented by American sound engineer Charles "Charley" Douglass.
Laugh trackLaughterTelevision terminologySound recording1950 introductions

Anti-social behaviour
Anti-social behaviour (with or without hyphen) is behaviour that lacks consideration for others and may cause damage to the society, whether intentionally or through negligence. This is opposed to pro-social behaviour, which is behaviour that helps or benefits the society. Criminal and civil laws in various countries offer remedies for anti-social behaviour.
Anti-social behaviourAnti-social behaviour

Static random-access memory
Static random-access memory (SRAM) is a type of semiconductor memory that uses bistable latching circuitry to store each bit. The term static differentiates it from dynamic RAM (DRAM) which must be periodically refreshed. SRAM exhibits data remanence, but is still volatile in the conventional sense that data is eventually lost when the memory is not powered.
Static random-access memoryComputer memory

Wall of Sound
The Wall of Sound is a music production technique for pop and rock music recordings developed by record producer Phil Spector at Gold Star Studios in Los Angeles, California, during the early 1960s. Working with such audio engineers as Larry Levine and the session musicians who became known as The Wrecking Crew, Spector created a dense, layered, reverberant sound that came across well on AM radio and jukeboxes popular in the era.
Wall of SoundMusical techniquesRecordingSound production

Drone music
Drone music is a minimalist musical style that emphasizes the use of sustained or repeated sounds, notes, or tone-clusters – called drones. It is typically characterized by lengthy audio programs with relatively slight harmonic variations throughout each piece compared to other musics. La Monte Young, one of its 1960s originators, defined it in 2000 as "the sustained tone branch of minimalism".
Drone musicContemporary classical music20th-century classical musicAmbient musicElectronic music genresExperimental music genresMinimalism

Errors and residuals in statistics
In statistics and optimization, statistical errors and residuals are two closely related and easily confused measures of the deviation of a sample from its "theoretical value". The error of a sample is the deviation of the sample from the (unobservable) true function value, while the residual of a sample is the difference between the sample and the estimated function value. The distinction is most important in regression analysis, where it leads to the concept of studentized residuals.
Errors and residuals in statisticsErrorStatistical terminologyMeasurementRegression analysisStatistical theoryStatistical deviation and dispersion

Crosstalk (electronics)
In electronics, crosstalk (XT) is any phenomenon by which a signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel. Crosstalk is usually caused by undesired capacitive, inductive, or conductive coupling from one circuit, part of a circuit, or channel, to another.
Crosstalk (electronics)Telecommunications termsElectronics terms

Psychoacoustics is the scientific study of sound perception. More specifically, it is the branch of science studying the psychological and physiological responses associated with sound. It can be further categorized as a branch of psychophysics.
PsychoacousticsAcousticsAuditory perceptionVirtual realityVoice technologyPsychophysicsHearing

Hydra Head Records
Hydra Head Records is an independent record label which specializes in heavy metal music, founded in New Mexico by Aaron Turner (the frontman of Isis) in 1993. It has two imprints; Hydra Head Noise Industries, which specialises in experimental and noise music, and another entitled Tortuga Records. Hydra Head was founded in 1993 as a distribution company while Turner was still in high school. In 1995, he moved to Boston to attend art school. In late 1995, he was handed a demo by local band Vent.
Hydra Head RecordsRecord labels established in 1993Alternative rock record labelsAmerican independent record labels

Wiener process
In mathematics, the Wiener process is a continuous-time stochastic process named in honor of Norbert Wiener. It is often called standard Brownian motion, after Robert Brown. It is one of the best known Lévy processes and occurs frequently in pure and applied mathematics, economics and physics. The Wiener process plays an important role both in pure and applied mathematics. In pure mathematics, the Wiener process gave rise to the study of continuous time martingales.
Wiener processMartingale theoryStochastic processesVariants of random walks

Nyquist–Shannon sampling theorem

Nyquist–Shannon sampling theorem

Noise barrier
A noise barrier (also called a soundwall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed to protect sensitive land uses from noise pollution. Noise barriers are the most effective method of mitigating roadway, railway, and industrial noise sources – other than cessation of the source activity or use of source controls.
Noise barrierRoad infrastructureNoise pollutionEnvironmental engineeringAcousticsNoise reduction

Hybrid (Welsh band)
Hybrid are a British electronic music group based in Swansea, comprising Mike Truman and Chris Healings, with the addition of Charlotte James completing their 2010 lineup. They are primarily known as a progressive breaks act, although they overlap considerably with progressive house and trance. However, the band are now taking a more structured approach to song writing, with the addition of Charlotte James contributing to the writing process.
Hybrid (Welsh band)Welsh musical groupsMedia and culture in SwanseaRemixersBritish electronic music groupsBreakbeat musicians

Johnson–Nyquist noise

Johnson–Nyquist noise

Noise Records
Noise Records was a German record label founded by German music industry personality Karl-Ulrich Walterbach in 1983 as an expansion of his company Modern Music Records. Noise Records specialized in thrash and melodic speed metal. It was sold to the Sanctuary Records Group in 2001 and ceased any activity in 2007 due to the bankruptcy of Sanctuary. The Noise catalogue was consequently acquired by Universal Music Group later on.
Noise RecordsRecord labels disestablished in 2007Defunct record labels of GermanyHeavy metal record labelsRecord labels established in 1983

A firecracker (also known as a cracker, noise maker, banger or bunger) is a small explosive device primarily designed to produce a large amount of noise, especially in the form of a loud bang; any visual effect is incidental to this goal. They have fuses, and are wrapped in a heavy paper casing to contain the explosive compound. Firecrackers, along with fireworks, originated in China.

Soundproofing is any means of reducing the sound pressure with respect to a specified sound source and receptor. There are several basic approaches to reducing sound: increasing the distance between source and receiver, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles, or using active antinoise sound generators.
SoundproofingSoundNoise reductionFluid dynamicsAcoustics

Spectral density
In statistical signal processing and physics, the spectral density, power spectral density (PSD), or energy spectral density (ESD), is a positive real function of a frequency variable associated with a stationary stochastic process, or a deterministic function of time, which has dimensions of power per hertz (Hz), or energy per hertz. It is often called simply the spectrum of the signal.
Spectral densityWavesFrequency domain analysisSignal processing

Sensorineural hearing loss
Sensorineural hearing loss (SNHL) is a type of hearing loss in which the root cause lies in the vestibulocochlear nerve, the inner ear, or central processing centers of the brain. The Weber test, in which a tuning fork is touched to the midline of the forehead, localizes to the normal ear in people with this condition. The Rinne test, which tests air conduction vs. bone conduction is positive (normal), though both bone and air conduction are reduced equally.
Sensorineural hearing lossDeafness

Intermodulation or intermodulation distortion (IMD) is the amplitude modulation of signals containing two or more different frequencies in a system with nonlinearities. The intermodulation between each frequency component will form additional signals at frequencies that are not just at harmonic frequencies of either, but also at the sum and difference frequencies of the original frequencies and at multiples of those sum and difference frequencies.
IntermodulationRadio electronicsElectronics termsWaves

Spectrum analyzer
A spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument. The primary use is to measure the power of the spectrum of known and unknown signals. The input signal a spectrum analyzer measures is electrical, however, spectral compositions of other signals, such as acoustic pressure waves and optical light waves, can be considered through the use of an appropriate transducer.
Spectrum analyzerSpectroscopyElectronic test equipmentSignal processingRadio technologyLaboratory equipmentScattering

Boss Corporation
Boss is a manufacturer of effects pedals for electric guitar and bass guitar. It is a division of the Roland Corporation, a Japanese manufacturer that specializes in musical equipment and accessories. For many years Boss manufactured a range of products related to effects processing for guitars, including "compact" and "twin" effects pedals, multi-effect pedals, electronic tuners and pedal boards.
Boss Corporation1973 establishments in JapanCompanies established in 1973Effects unitsElectric bass guitarsMusic equipment manufacturersGuitar manufacturing companiesGuitar effects manufacturing companies

Infrasound is sound that is lower in frequency than 20 Hz or cycles per second, the "normal" limit of human hearing. Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high. The ear is the primary organ for sensing infrasound, but at higher levels it is possible to feel infrasound vibrations in various parts of the body.
InfrasoundHearingSeismology and earthquake terminologyAcoustics

Joint Aviation Authorities
The Joint Aviation Authorities, or JAA, was an associated body of the ECAC representing the civil aviation regulatory authorities of a number of European States who had agreed to co-operate in developing and implementing common safety regulatory standards and procedures. It was not a regulatory body, regulation being achieved through the member authorities. In implementing the so-called FUJA Report, the JAA had entered into a new phase as of 1 January 2007.
Joint Aviation AuthoritiesAviation authoritiesAviation in Europe

Belching (also known as burping, ructus, or eructation) is the release of gas from the digestive tract through the mouth. It is usually accompanied with a typical sound and, at times, an odor.
BelchingSymptoms and signs: Digestive system and abdomen

Noise pop
Noise pop is a subgenre of alternative rock developed in the mid 1980s in the UK and US, that mixes dissonant noise or feedback, or both, with the melodic instrumentation and production elements more often found in pop music, making it more melodic and angst-free than noise rock.
Noise popAlternative rock

Post-industrial music
Post-industrial music is an umbrella term for a variety of new music genres that emerged in the early 1980s, all of which blended elements of varying styles with the then new genre of industrial music. "Industrial" had first been applied to music in the mid-1970s by the Industrial Records label artists. Since then, a number of labels and artists have come to be called "industrial".
Post-industrial musicPostindustrial societyIndustrial musicLists of music genres

Whitehouse (band)
Whitehouse are a pioneering English power electronics band formed in 1980, largely credited for the founding of the power electronics subgenre.
Whitehouse (band)Noise musicEnglish electronic music groupsMusical groups established in 1980British industrial music groups

Dolby noise-reduction system
Dolby NR is the name given to a series of noise reduction systems developed by Dolby Laboratories for use in analog magnetic tape recording. The first was Dolby A, a professional broadband noise reduction for recording studios in 1966, but the best-known is Dolby B (introduced 1968), a sliding band system for the consumer market, which helped make high fidelity practical on cassette tapes, and is common on stereo tape players and recorders to the present day.
Dolby noise-reduction systemAmerican inventionsNoise reductionSound recording

Shot noise
Shot noise is a type of electronic noise which originates from the discrete nature of electric charge. The term also applies to photon counting in optical devices, where shot noise is associated with the particle nature of light.
Shot noiseMesoscopic physicsNoiseQuantum opticsPoisson processesElectrical parametersElectronics terms

Noise mitigation
Noise mitigation is a set of strategies to reduce noise pollution. The main areas of noise mitigation or abatement are: transportation noise control, architectural design, and occupational noise control. Roadway noise and aircraft noise are the most pervasive sources of environmental noise worldwide, and little change has been effected in source control in these areas since the start of the problem, a possible exception being the development of hybrid and electric vehicles.
Noise mitigationRoad infrastructureNoise pollutionEnvironmental engineeringNoise reductionBuilding technologyEnvironmental design

Low-noise block downconverter
A low-noise block downconverter (or LNB) is the receiving device of a parabolic satellite dish antenna of the type commonly used for satellite TV reception.
Low-noise block downconverterElectronics termsTelecommunications equipmentAntennasSatellite broadcasting

Extreme Noise Terror
Extreme Noise Terror (often abbreviated to ENT) are a British crust punk / grindcore band originally formed in Ipswich, England in 1985. The band are widely considered one of the earliest and most influential European grindcore bands, and particularly the forefathers of the crustgrind subgenre.
Extreme Noise TerrorMusical sextetsEarache Records artistsCrust and d-beat groupsEnglish grindcore musical groupsMusical groups established in 1985Deathwish artistsEnglish heavy metal musical groups

Power noise
Power noise (also known as rhythmic noise, noize and occasionally as distorted beat music) 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. Its origins are predominately European.
Power noiseNoise musicIndustrial musicTechno genres

Organized Noize
Organized Noize is an Atlanta-based American hip hop production company made up of Rico Wade, Ray Murray and Sleepy Brown.
Organized NoizeAmerican hip hop record producersSouthern hip hop groupsDungeon Family