amplitude


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Related to amplitude: amplitude modulation

amplitude

(ăm`plĭto͞od'), in physics, maximum displacement from a zero value or rest position. In the harmonic motionharmonic motion,
regular vibration in which the acceleration of the vibrating object is directly proportional to the displacement of the object from its equilibrium position but oppositely directed.
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 of a pendulum, the amplitude of the swing is the greatest distance reached to either side of the central rest position. Amplitude is important in the description of a wavewave,
in physics, the transfer of energy by the regular vibration, or oscillatory motion, either of some material medium or by the variation in magnitude of the field vectors of an electromagnetic field (see electromagnetic radiation).
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 phenomenon such as light or sound. In general, the greater the amplitude of the wave, the more energy it transmits (e.g., a brighter light or a louder sound).

amplitude

1. Symbol: δm . The difference between the maximum and minimum magnitudes of a variable star, i.e. the range in magnitude of the star. The amplitude of pulsating variables is related to the logarithm of the period.
2. The maximum instantaneous deviation of an oscillating quantity from its average value.

amplitude

[′am·plə‚tüd]
(astronomy)
The range in brightness of a variable star, usually expressed in magnitudes.
(mathematics)
The angle between a vector representing a specified complex number on an Argand diagram and the positive real axis. Also argument.
(navigation)
Angular distance north or south of the prime vertical; the arc of the horizon, or the angle at the zenith between the prime vertical and a vertical circle, measured north or south from the prime vertical to the vertical circle.
(physics)
The maximum absolute value attained by the disturbance of a wave or by any quantity that varies periodically.

amplitude

Of oscillation or vibration, the maximum displacement from the mean position.

amplitude

amplitudeclick for a larger image
i. The amplitude of a wave is the maximum displacement, or the maximum value, it attains from its mean position during a cycle. It is both positive and negative. With sound waves, the greater the amplitude, the louder is the sound.
ii. Angular distance north or south of the prime vertical; the arc of the horizon or the angle at the zenith between the prime vertical and a vertical circle, measured north or south from the prime vertical circle. The term is used customarily only to refer to bodies whose centers are on the celestial horizon and is prefixed “E” or “W” as the body is rising or setting, respectively, and suffixed “N” or “S” to agree with the declination.

amplitude

1. Astronomy the angular distance along the horizon measured from true east or west to the point of intersection of the vertical circle passing through a celestial body
2. Maths (of a complex number) the angle that the vector representing the complex number makes with the positive real axis. If the point (x, y) has polar coordinates (r, θ), the amplitude of x + iy is θ, that is, arctan y/x
3. Physics the maximum variation from the zero or mean value of a periodically varying quantity

amplitude

The strength or volume of a signal, usually measured in decibels. See wavelength.


Amplitude
The amplitude is the power of a signal. The greater the amplitude, the greater the energy carried.
References in periodicals archive ?
The advantage of the use of this equipment type in relation to mechanical systems is that the frequency, amplitude and vibration time can be easily controlled.
0]--average duration of disturbance impulse during elementary volume destruction; [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII]--displacement amplitude that depends on physical and mechanical material characteristics; ao single compensation impulse amplitude during displacement (this is constant and does not depend on deformation); [l.
Consistent with their predictions, Paige and colleagues found that Vietnam veterans with PTSD had significantly reduced P2 amplitude intensity slopes compared with veterans without PTSD [1].
Chris Conderson, managing director of Amplitude, said: "Acorn fits in well with our business.
As is known, the greater the amplitude of harmonic signal, the greater the amplitude of the dynamic error [epsilon] = [[alpha].
Analysis done using the CM and the CDM strongly depended on sampling frequency if the TWA episodes were short and had low amplitude.
The Visco-Elastograph can be operated in the following modes: Frequency sweep; amplitude sweep; temperature sweep; vulcanization; frequency and amplitude sweep with prior deflection; ramp test with deformation angle up to 90[degrees]; and relaxation test with deformation angle up to 90[degrees].
FEA simulation can be programmed to show the relative stress at various locations on the horn and a displacement simulation that shows the relative amplitude of movement at those locations.
In this collection of papers from the ASTM symposium of May 2002, contributors describe their laboratory research in fatigue testing (including the role of variable amplitude fatigue standards in improving structural integrity), aerospace applications (such as spectrum editing for a full-scale fatigue test of a fighter aircraft wing with bullet loading), design approaches and modeling (such as crack growth and closure in variable-amplitude fatigue), load interaction, and probabilistic and mechanical effects.
As the nucleon is a composite system of strong interacting quarks, the amplitude M of the process in Eq.
The insertion loss is a direct measure of the ratio of the transmitted amplitude of each frequency component to the incident amplitude at the front of the interconnect.