Deafness, or hearing impairment, is a partial or total inability to hear where the ability would usually be expected.
DeafnessDisabilityNoise pollutionDeaf cultureDeafnessCommunication disorders
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 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 (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 (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 (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 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
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 (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 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
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
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 (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 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
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
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
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
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
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
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 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 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 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 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 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 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 (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 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
Aircraft noise is noise pollution produced by any aircraft or its components, during various phases of a flight: on the ground while parked such as auxiliary power units, while taxiing, on run-up from propeller and jet exhaust, during take off, underneath and lateral to departure and arrival paths, over-flying while en route, or during landing.
Aircraft noiseNoise pollutionAviation and the environment
Pink noise or 1/ƒ noise (sometimes also called flicker noise) is a signal or process with a frequency spectrum such that the power spectral density (energy or power per Hz) is inversely proportional to the frequency. In pink noise, each octave carries an equal amount of noise power. The name arises from the pink appearance of visible light with this power spectrum.
Image noise is random (not present in the object imaged) 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. Image noise can also originate in film grain and in the unavoidable shot noise of an ideal photon detector. Image noise is an undesirable by-product of image capture that adds spurious and extraneous information.
Image noiseNoiseComputer visionDigital photography
A Bleep censor (or "bleeping") is the replacement of profanity or classified information with a beep sound, in television or radio. It is mainly used in the United Kingdom, Canada, the United States, Australia, New Zealand, Hong Kong, Japan, and Taiwan.
Bleep censorBroadcast engineeringSelf-censorshipCensorship of broadcasting
The (International) Noise Conspiracy
The (International) Noise Conspiracy (abbreviated TNC) is a Swedish rock band formed in Sweden in the late months of 1998. The line-up consists of Dennis Lyxzén (vocals), Inge Johansson (bass), Lars Strömberg (guitar), and Ludwig Dahlberg (drums). The band is known for its punk and garage rock musical influences, and its impassioned left-wing political stance. Up until 2004, guitarist/organist/keyboardist Sara Almgren was also a member of the band.
The (International) Noise ConspiracySwedish communistsRefusedSwedish punk rock groupsG7 Welcoming Committee Records artistsSympathy for the Record Industry artistsGarage punk groupsEpitaph Records artistsSwedish indie rock groups
Noise, vibration, and harshness
Noise, vibration, and harshness (NVH), also known as noise and vibration (N&V), is the study and modification of the noise and vibration characteristics of vehicles, particularly cars and trucks. While noise and vibration can be readily measured, harshness is a subjective quality, and is measured either via "jury" evaluations, or with analytical tools that provide results reflecting human subjective impressions. These latter tools belong to the field known as "psychoacoustics.
Noise, vibration, and harshnessMechanical vibrationsNoise reductionAutomotive engineering
Additive white Gaussian noise
Additive white Gaussian noise (AWGN) is a channel model in which the only impairment to communication is a linear addition of wideband or white noise with a constant spectral density and a Gaussian distribution of amplitude. The model does not account for fading, frequency selectivity, interference, nonlinearity or dispersion.
Additive white Gaussian noiseTime series modelsNoiseCommunication
In analog-to-digital conversion, the difference between the actual analog value and quantized digital value is called quantization error or quantization distortion. This error is either due to rounding or truncation. The error signal is sometimes considered as an additional random signal called quantization noise because of its stochastic behaviour.
Quantization errorNoiseTelecommunications termsDigital audioSignal processing
Active noise control
Active noise control (ANC) (also known as noise cancellation, or active noise reduction) is a method for reducing unwanted sound.
Active noise controlAudio engineeringNoise reductionLoudspeaker technology
Roadway noise is the collective sound energy emanating from motor vehicles. In the USA it contributes more to environmental noise exposure than any other noise source, and is constituted chiefly of engine, tire, aerodynamic and braking elements. In other Western countries as well as lesser developed countries, roadway noise is expected to contribute a proportionately large share of the total societal noise pollution.
Roadway noiseNoise pollutionSounds by type
Phase noise is the frequency domain representation of rapid, short-term, random fluctuations in the phase of a waveform, caused by time domain instabilities. Generally speaking, radio frequency engineers speak of the phase noise of an oscillator, whereas digital system engineers work with the jitter of a clock. Historically there have been two conflicting yet widely used definitions for phase noise.
Phase noiseNoiseTelecommunications termsOscillators
In telecommunication, signal processing, and thermodynamics, companding (occasionally called compansion) is a method of mitigating the detrimental effects of a channel with limited dynamic range. The name is a portmanteau of compressing and expanding. The use of companding allows signals with a large dynamic range to be transmitted over facilities that have a smaller dynamic range capability.
CompandingAudio engineeringSound recording technologyLossy compression algorithms
Noise figure (NF) is a measure of degradation of the signal-to-noise ratio (SNR), caused by components in a radio frequency (RF) 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 noise temperature . The noise figure is thus the ratio of actual output noise to that which would remain if the device itself did not introduce noise.
Noise figureNoiseRadar signal processing
Acoustic signature is used to describe a combination of acoustic emissions of ships and submarines.
Acoustic signatureAnti-submarine warfareWeapons countermeasuresSonar
Health effects from noise
Noise health effects are the health consequences of elevated sound levels. Elevated workplace or other noise can cause hearing impairment, hypertension, ischemic heart disease, annoyance and sleep disturbance. Changes in the immune system and birth defects have been attributed to noise exposure.
Health effects from noiseNoise pollutionHealth sciencesDeterminants of healthEnvironmental health
Karl Guthe Jansky
Karl Guthe Jansky (October 22, 1905 – February 14, 1950) was an American physicist and radio engineer who in August 1931 first discovered radio waves emanating from the Milky Way. He is considered one of the founding figures of radio astronomy.
Karl Guthe Jansky1905 birthsAmerican engineers1950 deathsPeople from Little Silver, New JerseyAmerican people of Czech descentAmerican physicistsAmateur astronomersAmerican astronomersScientists at Bell LabsRadio astronomersPeople from Norman, OklahomaCzechs in Oklahoma
Cum on Feel the Noize
"Cum On Feel the Noize" File:Slade-cum-on-feel-the-noize-polydor-3. jpgUK/European cover of "Cum On Feel the Noize".
Cum on Feel the NoizeSlade songsUK Singles Chart number-one singles1983 singlesGlam rock songsSongs written by Jim LeaSongs written by Noddy Holder1973 singlesQuiet Riot songsOasis (band) songsSingles certified gold by the Recording Industry Association of AmericaSongs produced by Chas ChandlerIrish Singles Chart number-one singles
is a portmanteau of the words "Japanese" and "noise": a term applied to the diverse, prolific, and influential noise music scene of Japan. Primarily popular and active in the 1980s and 1990s but still alive today, the Japanoise scene is defined by a remarkable sense of musical freedom.
JapanoiseNoise musicJapanese music
Noise regulation includes statutes or guidelines relating to sound transmission established by national, state or provincial and municipal levels of government. After the watershed passage of the United States Noise Control Act of 1972, other local and state governments passed further regulations.
Noise regulationNoise pollutionEnvironmental science
Bioacoustics is a cross-disciplinary science that combines biology and acoustics. Usually it refers to the investigation of sound production, dispersion through elastic media, and reception in animals, including humans. This involves neurophysiological and anatomical basis of sound production and detection, and relation of acoustic signals to the medium they disperse through.
Visible Noise is a British independent record label that focuses solely on British bands.
Visible NoiseAlternative rock record labelsIndependent record labelsBritish independent record labels
Signal integrity or SI is a set of measures of the quality of an electrical signal. In digital electronics, a stream of binary values is represented by a voltage (or current) waveform. However, digital signals are fundamentally analog in nature, and all signals are subject to effects such as noise, distortion, and loss. Over short distances and at low bit rates, a simple conductor can transmit this with sufficient fidelity.
Signal integrityElectronic design automationDigital electronics
In acoustics and specifically in acoustical engineering, background noise or ambient noise is any sound other than the sound being monitored(primary sound). Background noise is a form of noise pollution or interference. Background noise is an important concept in setting noise regulations. See noise criteria for cinema/home cinema applications.
Alex Ross (music critic)
Alex Ross (born 1968) is an American music critic. He has been on the staff of The New Yorker magazine since 1996 and published a critically acclaimed book on 20th-century classical music in 2007, The Rest Is Noise: Listening to the Twentieth Century.
Alex Ross (music critic)Harvard University alumniLGBT writers from the United StatesMacArthur FellowsLiving peopleAmerican bloggersGay writers1968 birthsSt. Albans School (Washington, D.C.) alumniAmerican music journalistsAmerican music criticsOpera criticsThe New Yorker criticsThe New Yorker peopleClassical music critics
In signal theory, the noise floor is the measure of the signal created from the sum of all the noise sources and unwanted signals within a measurement system, where noise is defined as any signal other than the one being monitored. In radio communication and electronics, this may include thermal noise, blackbody, cosmic noise as well as atmospheric noise from distant thunderstorms and similar and any other unwanted man made signals, sometimes referred to as incidental noise.
ITU-R 468 noise weighting
ITU-R 468 (originally defined in CCIR recommendation 468-4) is a standard relating to noise measurement, widely used when measuring noise in audio systems. The standard defines a weighting filter curve, together with a quasi-peak rectifier having special characteristics as defined by specified tone-burst tests. It is currently maintained by the European Broadcasting Union who took it over from the CCIR.
ITU-R 468 noise weightingSoundNoiseStandardsAudio engineeringITU-R recommendations
Noise-induced hearing loss
Noise-induced hearing loss (NIHL) is an increasingly prevalent disorder that results from exposure to high-intensity sound, especially over a long period of time.
Noise-induced hearing lossIndustrial hygieneDeafness
Lansing State Journal
The Lansing State Journal is a daily newspaper published in Lansing, Michigan owned by Gannett.
Lansing State JournalLansing, MichiganNewspapers published in MichiganGannett publications
Black Tie White Noise
Black Tie White Noise is an album by David Bowie. Released in 1993, it was his first solo release in the 1990s after spending time with his hard rock band Tin Machine, retiring his old hits on his Sound+Vision Tour, and marrying supermodel Iman Abdulmajid. This album featured his old guitarist from the Ziggy Stardust era, Mick Ronson, who died of cancer later in the year.
Black Tie White Noise1993 live albumsDavid Bowie albumsLive video albumsAlbums produced by David BowieAlbums produced by Nile Rodgers1993 video albumsDavid Bowie video albums1993 albums
Low-noise amplifier (LNA) is an electronic amplifier used to amplify possibly very weak signals (for example, captured by an antenna). It is usually located very close to the detection device to reduce losses in the feedline. This active antenna arrangement is frequently used in microwave systems like GPS, because coaxial cable feedline is very lossy at microwave frequencies, e.g. a loss of 10% coming from few meters of cable would cause a 10% degradation of the signal-to-noise ratio (SNR).
Low-noise amplifierElectronic amplifiers
In electronics, noise temperature is one way of expressing the level of available noise power introduced by a component or source.
Noise temperatureNoiseTelecommunications termsElectronics terms
Colors of noise
While noise is by definition derived from a random signal, it can have different characteristic statistical properties corresponding to different mappings from a source of randomness to the concrete noise. Spectral density is such a property, which can be used to distinguish different types of noise. This classification by spectral density is given "color" terminology, with different types named after different colors, and is common in different disciplines where noise is an important factor.
Colors of noiseNoiseEncodings
Bruit is the term for the unusual sound that blood makes when it rushes past an obstruction in an artery when the sound is auscultated with the bell portion of a stethoscope. The term "bruit" simply refers to the sound. A related term is "vascular murmur", which should not be confused with a heart murmur. The location of the stethoscope when the sound is observed can affect the diagnosis.
BruitFrench medical phrasesSymptoms and signs: Vascular
Saber-noise or saber-rattling (Spanish: ruido de sables) may be used to refer to a historical incident in Chilean history that took place on September 3, 1924, when a group of young military officers protested against the political class and the postponement of social measures by rattling their sabers within their scabbards.
Saber noiseHistory of ChileMetaphors referring to war and violence1924 in ChilePolitical metaphors
Dbx (noise reduction)
dbx is a family of noise reduction systems developed by the company of the same name. The most common implementations are dbx Type I and dbx Type II for analog tape recording and, less commonly, vinyl LPs. A separate implementation, known as dbx-TV, is part of the MTS system used to provide stereo sound to North American and certain other TV systems. The company – dbx, Inc. – was also involved with Dynamic Noise Reduction (DNR) systems.
Dbx (noise reduction)Noise reductionSound recording
Noise shaping is a technique typically used in digital audio, image, and video processing, usually in combination with dithering, as part of the process of quantization or bit-depth reduction of a digital signal. Its purpose is to increase the apparent signal to noise ratio of the resultant signal.
Noise shapingDigital signal processingNoiseAudio engineering
Automotive aerodynamics is the study of the aerodynamics of road vehicles. The main concerns of automotive aerodynamics are reducing drag (though drag by wide wheels is dominating most cars), reducing wind noise, minimizing noise emission, and preventing undesired lift forces and other causes of aerodynamic instability at high speeds. For some classes of racing vehicles, it may also be important to produce desirable downwards aerodynamic forces to improve traction and thus cornering abilities.
Automotive aerodynamicsAerodynamicsAutomotive engineering
In telecommunications, squelch is a circuit function that acts to suppress the audio output of a receiver in the absence of a sufficiently strong desired input signal.
SquelchRadio electronicsTelecommunications terms
White Noise (film)
White Noise is a 2005 supernatural horror film, directed by Geoffrey Sax. The title refers to electronic voice phenomena (EVP), where voices, which some believe to be from the "other side," can be heard on audio recordings. The film is not related to the postmodern novel White Noise by Don DeLillo.
White Noise (film)British thriller filmsBritish filmsAmerican filmsFilms directed by Geoffrey SaxSupernatural thriller filmsCanadian films2005 filmsGhost films2000s thriller filmsFilms shot in VancouverUniversal Pictures filmsEnglish-language filmsCanadian thriller filmsAmerican thriller films
In cryptography, pseudo random noise (PRN) is a signal similar to noise which satisfies one or more of the standard tests for statistical randomness. Although it seems to lack any definite pattern, pseudo random noise consists of a deterministic sequence of pulses that will repeat itself after its period. In cryptographic devices, the pseudo random noise pattern is determined by a key and the repetition period can be very long, even millions of digits.
Pseudorandom noiseNoisePseudo randomness
Gaussian noise is statistical noise that has its probability density function equal to that of the normal distribution, which is also known as the Gaussian distribution. In other words, the values that the noise can take on are Gaussian-distributed. A special case is white Gaussian noise, in which the values at any pairs of times are statistically independent. In applications, Gaussian noise is most commonly used as additive white noise to yield additive white Gaussian noise.
Gaussian noiseNoiseStochastic processesTime series analysis
Black Foliage: Animation Music Volume One
Black Foliage: Animation Music Volume One (1999) is the second full length album released by The Olivia Tremor Control of The Elephant 6 Recording Company. In November of 2011, it is scheduled for re-release on Vinyl through Chunklet.
Black Foliage: Animation Music Volume One1999 albumsThe Olivia Tremor Control albums
The Bastard Noise is an American band founded in 1991.
Bastard NoiseAlternative Tentacles artistsNoise musical groupsAmerican experimental musical groupsAmerican electronic music groupsAlien8 Recordings artists
A quiet PC is a personal computer that makes little noise. Common uses for quiet PCs include video editing, sound mixing, home servers, and home theater PCs. A typical quiet PC uses quiet cooling and storage devices and energy-efficient parts. Like noise, the term "quiet PC" is subjective and there is currently no standard definition for a "quiet PC". However, a general definition proposed by one site is that the sound emitted by such PCs should not exceed 30 dBA.
Quiet PCNoise pollutionPersonal computers
Microphonics or microphony describes the phenomenon wherein certain components in electronic devices transform mechanical vibrations into an undesired electrical signal. The term comes from analogy with a microphone, which is intentionally designed to convert vibrations to electrical signals. When electronic equipment was built using vacuum tubes, microphonics were often a serious design problem.
A speckle pattern is an intensity pattern produced by the mutual interference of a set of wavefronts. This phenomenon has been investigated by scientists since the time of Newton, but speckles have come into prominence since the invention of the laser and have now found a variety of applications.
White Noise (band)
White Noise is an experimental electronic music band formed in London, England, in 1968 by American-born David Vorhaus, a classical bass player with a background in physics and electronic engineering. He was initially joined by BBC Radiophonic Workshop composers Delia Derbyshire and Brian Hodgson, both ex of electronic music project Unit Delta Plus.
White Noise (band)British electronic music groups
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 associated only with noise induced hearing loss (NIHL).
Industrial noiseNoiseNoise pollutionIndustrial hygieneOccupational safety and health
Environmental impact of shipping
The environmental impact of shipping includes greenhouse gas emissions and oil pollution. Carbon dioxide emissions from shipping is currently estimated at 4 to 5 percent of the global total, and estimated by the International Maritime Organisation (IMO) to rise by up to 72 percent by 2020 if no action is taken. The First Intersessional Meeting of the IMO Working Group on Greenhouse Gas Emissions from Ships took place in Oslo, Norway on 23–27 June 2008.
Environmental impact of shippingEnvironmental issues with shippingOcean pollution
Flicker noise is a type of electronic noise with a 1/ƒ, or pink power density spectrum. It is therefore often referred to as 1/ƒ noise or pink noise, though these terms have wider definitions. It occurs in almost all electronic devices, and can show up with a variety of other effects, such as impurities in a conductive channel, generation and recombination noise in a transistor due to base current, and so on.