Definition
Frequency is the number of occurrences of a repeating event per unit of time. Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals (sound), radio waves, and light.
Related concepts
Acoustic resonanceAcoustical engineeringAcousticsAfricaAlternating currentAngular displacementAngular frequencyArchitectural acousticsArgument of a functionAsiaAudible frequencyAudio frequencyAudio recordingAudio signalAustraliaAverageBandwidth (signal processing)Bark scaleBeat (acoustics)BecquerelCGPMCarleen HutchinsChirpCombination toneCutoff frequencyCycle per secondD. Van HollidayDigital displayDigital logicDimensional analysisDimensionless quantityDiodeDiscrete-time signalDispersion (optics)Dispersion relationDivision (mathematics)DownsamplingEchoElectric fieldElectromagnetElectromagnetic radiationElectromagnetic waveElectronic filterElectronic instrumentationEqual-loudness contourErnst ChladniEuropeEvent (philosophy)Fletcher–Munson curvesFormantFourier analysisFranz MeldeFrequencies (album)Frequencies (film)Frequency (disambiguation)Frequency bandFrequency changerFrequency converterFrequency counterFrequency distributionFrequency domainFrequency extenderFrequency gridFrequency levelFrequency meterFrequency modulationFrequency spectrumFundamental frequencyGamma rayHarmonicHarmonic series (music)Harmonic spectrumHeinrich HertzHermann von HelmholtzHertzHeterodyneHeterodyningInfraredInfrasoundInharmonicityInteraction frequencyInternational Electrotechnical CommissionInternational System of UnitsJens BlauertJohn Backus (acoustician)John William Strutt, 3rd Baron RayleighJoseph SauveurLambdaLeast-squares spectral analysisLightMagnetic fieldMains electricityMains humMarin MersenneMedium (optics)Mel scaleMersenne's lawsMicrowaveMinor thirdMissing fundamentalMonochordMonochromatic radiationMultiplicative inverseMusical acousticsMusical noteNatural frequencyNegative frequencyNode (physics)North AmericaNu (letter)Number of entitiesNumber of rotationsOcean surface waveOmega (letter)Optical heterodyne detectionOrders of magnitude (frequency)OscillationOscillationsOvertonePendulumPeriodic functionPeriodicity (disambiguation)Phase (waves)Phase speedPhase velocityPhysical quantityPiano acousticsPink noisePitch (music)PreselectorPsychoacousticsQuartz clockQuotientRadar signal characteristicsRadianRadio frequencyRadio waveRadioactive decayRandom errorRate (mathematics)Reciprocal secondResonanceReverberationRevolution per minuteRotational frequencyRotational motionRussiaSISI base unitSI unitSPIESampling intervalSecondSignal (electronics)Signaling (telecommunications)Simple harmonic motionSine functionSine waveSoundSound waveSoundproofingSouth AmericaSpatial frequencySpatial periodSpecial caseSpeciesSpectral componentSpectrogramSpeed of lightSpeed of soundSpread spectrumStanding waveString vibrationStrobe lightStroboscopeSympathetic resonanceTemporal rateThetaThomas Young (scientist)Threshold of hearingTimbreTimeTransducerTransverterUltrasoundUltravioletUndertone seriesUnit of timeUpsamplingUtility frequencyVacuumVibrationViolin acousticsVisible spectrumWaveWave propagationWavelengthWerner Meyer-EpplerX-rayΞ
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