73 relations: Adult, Alternating current, Angular frequency, Angular velocity, Aperiodic frequency, Apple Inc., Atari, Atom vibrations, Bandwidth (signal processing), Becquerel, Bus (computing), Caesium, Central processing unit, CJK Compatibility, Clock rate, Clock signal, Commodore International, Cycle per second, Electromagnetic radiation, Electromagnetic spectrum, Electromagnetism, Electronic tuner, Energy, Femto-, FLOPS, Frequency, Frequency changer, Front-side bus, Gamma ray, General Conference on Weights and Measures, Heart rate, Heinrich Hertz, IBM POWER microprocessors, Infrared, Infrasound, International Bureau of Weights and Measures, International Committee for Weights and Measures, International Electrotechnical Commission, International System of Units, Inverse second, Light, Longitudinal wave, Megahertz myth, Metric prefix, Molecular vibration, Musical note, Musical tone, Normalized frequency (unit), Northbridge (computing), Orders of magnitude (frequency), ..., Oscillation, Periodic function, Photon, Pitch (music), Planck constant, Pressure, Radian, Radian per second, Radio, Radioactive decay, Rate (mathematics), Second, SI base unit, SI derived unit, Sine wave, Sound, Square wave, Stochastic, Tera-, Terahertz radiation, Ultrasound, Ultraviolet, Wavelength. Expand index (23 more) »

## Adult

Biologically, an adult is a human or other organism that has reached sexual maturity.

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## Alternating current

Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction.

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## Angular frequency

In physics, angular frequency ω (also referred to by the terms angular speed, radial frequency, circular frequency, orbital frequency, radian frequency, and pulsatance) is a scalar measure of rotation rate.

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## Angular velocity

In physics, the angular velocity of a particle is the rate at which it rotates around a chosen center point: that is, the time rate of change of its angular displacement relative to the origin.

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## Aperiodic frequency

Aperiodic frequency is the rate of incidence or occurrence of non-cyclic phenomena, including random processes such as radioactive decay.

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## Apple Inc.

Apple Inc. is an American multinational technology company headquartered in Cupertino, California, that designs, develops, and sells consumer electronics, computer software, and online services.

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## Atari

Atari is a corporate and brand name owned by several entities since its inception in 1972, currently by Atari Interactive, a subsidiary of the French publisher Atari, SA.

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## Atom vibrations

The atoms and ions of a crystalline lattice, which are bonded with each other with considerable inter molecular forces, are not motionless.

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## Bandwidth (signal processing)

Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.

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## Becquerel

The becquerel (symbol: Bq) is the SI derived unit of radioactivity.

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## Bus (computing)

In computer architecture, a bus (a contraction of the Latin omnibus) is a communication system that transfers data between components inside a computer, or between computers.

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## Caesium

Caesium (British spelling and IUPAC spelling) or cesium (American spelling) is a chemical element with symbol Cs and atomic number 55.

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## Central processing unit

A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions.

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## CJK Compatibility

CJK Compatibility is a Unicode block containing square symbols (both CJK and Latin alphanumeric) encoded for compatibility with east Asian character sets.

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## Clock rate

The clock rate typically refers to the frequency at which a chip like a central processing unit (CPU), one core of a multi-core processor, is running and is used as an indicator of the processor's speed.

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## Clock signal

In electronics and especially synchronous digital circuits, a clock signal is a particular type of signal that oscillates between a high and a low state and is used like a metronome to coordinate actions of digital circuits.

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## Commodore International

Commodore International (or Commodore International Limited) was an American home computer and electronics manufacturer founded by Jack Tramiel.

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## Cycle per second

The cycle per second was a once-common English name for the unit of frequency now known as the hertz.

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## Electromagnetic radiation

In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space-time, carrying electromagnetic radiant energy.

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## Electromagnetic spectrum

The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.

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## Electromagnetism

Electromagnetism is a branch of physics involving the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles.

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## Electronic tuner

In music, an electronic tuner is a device that detects and displays the pitch of musical notes played on a musical instrument.

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## Energy

In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.

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## Femto-

Femto- (symbol f) is a unit prefix in the metric system denoting a factor of 10−15 or.

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## FLOPS

In computing, floating point operations per second (FLOPS, flops or flop/s) is a measure of computer performance, useful in fields of scientific computations that require floating-point calculations.

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## Frequency

Frequency is the number of occurrences of a repeating event per unit of time.

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## Frequency changer

A frequency changer or frequency converter is an electronic or electromechanical device that converts alternating current (AC) of one frequency to alternating current of another frequency.

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## Front-side bus

A front-side bus (FSB) was a computer communication interface (bus) often used in Intel-chip-based computers during the 1990s and 2000s.

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## Gamma ray

A gamma ray or gamma radiation (symbol γ or \gamma), is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei.

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## General Conference on Weights and Measures

The General Conference on Weights and Measures (Conférence générale des poids et mesures – CGPM) is the supreme authority of the International Bureau of Weights and Measures (Bureau international des poids et mesures – BIPM), the inter-governmental organization established in 1875 under the terms of the Metre Convention (Convention du Mètre) through which Member States act together on matters related to measurement science and measurement standards.

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## Heart rate

Heart rate is the speed of the heartbeat measured by the number of contractions of the heart per minute (bpm).

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## Heinrich Hertz

Heinrich Rudolf Hertz (22 February 1857 – 1 January 1894) was a German physicist who first conclusively proved the existence of the electromagnetic waves theorized by James Clerk Maxwell's electromagnetic theory of light.

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## IBM POWER microprocessors

IBM has a series of high performance microprocessors called POWER followed by a number designating generation, i.e. POWER1, POWER2, POWER3 and so forth up to the latest POWER9.

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## Infrared

Infrared radiation (IR) is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye (although IR at wavelengths up to 1050 nm from specially pulsed lasers can be seen by humans under certain conditions). It is sometimes called infrared light.

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## Infrasound

Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz or cycles per second, the "normal" limit of human hearing.

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## International Bureau of Weights and Measures

The International Bureau of Weights and Measures (Bureau international des poids et mesures) is an intergovernmental organization established by the Metre Convention, through which Member States act together on matters related to measurement science and measurement standards.

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## International Committee for Weights and Measures

The International Committee for Weights and Measures (abbreviated CIPM from the French Comité international des poids et mesures) consists of eighteen persons, each of a different nationality, from Member States of the Metre Convention (Convention du Mètre) appointed by the General Conference on Weights and Measures (CGPM) whose principal task is to promote worldwide uniformity in units of measurement by taking direct action or by submitting proposals to the CGPM.

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## International Electrotechnical Commission

The International Electrotechnical Commission (IEC; in French: Commission électrotechnique internationale) is an international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology".

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## International System of Units

The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.

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## Inverse second

The inverse second, reciprocal second, or per second (s−1) is a unit of frequency, defined as the multiplicative inverse of the second (a unit of time).

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## Light

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.

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## Longitudinal wave

Longitudinal waves are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave.

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## Megahertz myth

The megahertz myth, or less commonly the gigahertz myth, refers to the misconception of only using clock rate (for example measured in megahertz or gigahertz) to compare the performance of different microprocessors.

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## Metric prefix

A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or fraction of the unit.

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## Molecular vibration

A molecular vibration occurs when atoms in a molecule are in periodic motion while the molecule as a whole has constant translational and rotational motion.

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## Musical note

In music, a note is the pitch and duration of a sound, and also its representation in musical notation (♪, ♩).

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## Musical tone

Traditionally in Western music, a musical tone is a steady periodic sound.

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## Normalized frequency (unit)

Normalized frequency is a unit of measurement of frequency equivalent to cycles/sample.

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## Northbridge (computing)

A northbridge or host bridge is one of the two chips in the core logic chipset architecture on a PC motherboard, the other being the southbridge.

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## Orders of magnitude (frequency)

To help compare different orders of magnitude, the following list describes various frequencies, which is measured in hertz.

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## Oscillation

Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.

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## Periodic function

In mathematics, a periodic function is a function that repeats its values in regular intervals or periods.

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## Photon

The photon is a type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light, and the force carrier for the electromagnetic force (even when static via virtual particles).

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## Pitch (music)

Pitch is a perceptual property of sounds that allows their ordering on a frequency-related scale, or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies.

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## Planck constant

The Planck constant (denoted, also called Planck's constant) is a physical constant that is the quantum of action, central in quantum mechanics.

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## Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

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## Radian

The radian (SI symbol rad) is the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics.

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## Radian per second

The radian per second (symbol: rad·s−1 or rad/s) is the SI unit of rotational speed (angular velocity), commonly denoted by the Greek letter ω (omega).

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## Radio

Radio is the technology of using radio waves to carry information, such as sound, by systematically modulating properties of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width.

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## Radioactive decay

Radioactive decay (also known as nuclear decay or radioactivity) is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron capture, gamma ray, or electron in the case of internal conversion.

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## Rate (mathematics)

In mathematics, a rate is the ratio between two related quantities.

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## Second

The second is the SI base unit of time, commonly understood and historically defined as 1/86,400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each.

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## SI base unit

The International System of Units (SI) defines seven units of measure as a basic set from which all other SI units can be derived.

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## SI derived unit

SI derived units are units of measurement derived from the seven base units specified by the International System of Units (SI).

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## Sine wave

A sine wave or sinusoid is a mathematical curve that describes a smooth periodic oscillation.

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## Sound

In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid.

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## Square wave

A square wave is a non-sinusoidal periodic waveform in which the amplitude alternates at a steady frequency between fixed minimum and maximum values, with the same duration at minimum and maximum.

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## Stochastic

The word stochastic is an adjective in English that describes something that was randomly determined.

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## Tera-

Tera is a unit prefix in the metric system denoting multiplication by 1012 or (one trillion short scale; one billion long scale).

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## Terahertz radiation

Terahertz radiation – also known as submillimeter radiation, terahertz waves, tremendously high frequency (THF), T-rays, T-waves, T-light, T-lux or THz – consists of electromagnetic waves within the ITU-designated band of frequencies from 0.3 to 3 terahertz (THz; 1012 Hz).

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## Ultrasound

Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing.

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## Ultraviolet

Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.

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## Wavelength

In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.

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## Redirects here:

1 E3 Hz, Attohertz, Centihertz, DaHz, Decahertz, Decihertz, EHz, Exahertz, Femtohertz, GHz, Gigahertz, Gihz, Hectohertz, Hertez, Hertz (frequency), Hertz (unit), Hertz unit, Hz, KHZ, KHz, Khertz, Khz, Kilohertz, MHZ, MHz, MegaHertz, Megacycles, Megahertz, Mhz, Microhertz, Millihertz, Nanohertz, PHz, Petahertz, Picohertz, Terahertz (unit), Tetrahertz, Yoctohertz, Yottahertz, ZHz, Zeptohertz, Zettahertz, ㎐, ㎑, ㎒, ㎓, ㎔.

## References

[1] https://en.wikipedia.org/wiki/Hertz