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Attenuation (AT) is a general term used to denote the decrease in power between that transmitted and that received due to loss through equipment, lines, or other transmission devices It is usually expressed as a ratio in dB (decibel)
loss of a substance as it is deflected, fragmented, or absorbed For example, solar irradiance attenuates as it passes through the atmosphere to the surface of the earth
the property of something that has been weakened or reduced in thickness or density weakening in force or intensity; "attenuation in the volume of the sound
The decrease in magnitude of current, voltage, or power of a signal in transmission between two points May be expressed in decibels
The decrease of signal strength as it travels through the cable or device, measured in decibels
is the decrease in signal strength as the signal travels through any medium such as a cable
The process by which a compound is reduced in concentration over time, through adsorption, degradation, dilution, and/or transformation Radiologically, it is the reduction of the intensity of radiation upon passage through a medium The attenuation is caused by absorption and scattering
Decrease in magnitude of power of a signal in transmission between points When used for expressing the total loss of an optical system, attenuation is measured in decibels (dB) at a specific wavelength
(communications usage) Signal strength loss between the transmission and reception points For example: Heavy rainstorms can cause microwave signals to seem to fade, i e , to attenuate, as the rainstorm passes through an area (See also: Rain Fade)
{i} reduction; weakening; decrease; diminution; being weakened; weakening of a signal as the length of a network cable increases (Computers)
A loss of signal strength in a lightwave, electrical or radio signal usually related to the distance the signal must travel (e g fiber optic transmission must be regenerated approx every 30 miles) Fiber optic attenuation is caused by transparency of the fiber, bending the fiber at too small of a radius, nicks in the fiber, splices, poor fiber terminals, FOTs, etc (See EDOA), Electrical attenuation is caused by the resistance of the conductor, poor (corroded) connections, poor shielding, induction, RFI, etc Radio signal attenuation may be due to atmospheric conditions, 1 spots, antenna design / positioning, obstacles, etc
1 Atmospheric attenuation: the simulation of the atmospheric attenuation from the object to the viewer which affects both the illumination strength and color The attenuated illumination is computed by where s is a scale factor ranging from 0 to 1, is the illumination and is the depth-cue color 2 Light source attenuation: a factor in the illumination equation used to simulate surface illumination depending on how far the surface is from the light source It is defined by: where is the distance between the source light and the surface, and and are user defined constants associated with the light source
The decrease in magnitude of a signal as it travels through any transmission medium such as a cable or optical fiber Measured in dB per unit of length
The decrease in magnitude of power of a signal in transmission between points For example, in fiber, expresses the total loss of an optical fiber consisting of the ratio of light output to light input Attenuation is measured in decibels (fiber or copper) per kilometer (dB/km) at a specific wavelength or frequency The lower the number, the better Typical multimode wavelengths are 850 - 1300 nanometers (nm) and singlemode are at 1300 - 1550 nm Copper is now characterized up to 350 MHz plus
the property of something that has been weakened or reduced in thickness or density
The loss in signal strength (weakening of power) associated with the transmission process Attenuation is usually expressed as the ratio of received signal strength to transmitted signal strength This ratio is often expressed in decibels, a logarithmic unit for expressing dimensionless ratios
The process of weakening in intensity; diminution of virulence; as, the attenuation of virus
The decrease in intensity of a signal, beam, or wave as a result of absorption of energy and of scattering out of the path to the detector, but not including the reduction due to geometric spreading [After JP1] Note 1: Attenuation is usually expressed in dB Note 2: "Attenuation" is often used as a misnomer for "attenuation coefficient," which is expressed in dB per kilometer Note 3: A distinction must be made as to whether the attenuation is that of signal power or signal electric field strength
the diminution of quantity In the case of visibility, attenuation or extinction refers to the loss of image-forming light as it passes from an object to the observer
The decrease in radiation energy (power) as a beam passes through an absorbing or scattering medium
A reduction in strength or deterioration of an electrical signal as it passes through a transmission medium Attenuation generally increases with frequency, cable length and the number of connections in a circuit Attenuation is measured in deciBels (dB) In optical fiber, a diminution of the signal as a function of length traveled
Decrease in intensity of a signal, beam, or wave as a result of absorption and scattering out of the path of a detector, but not including the reduction due to geometric spreading (i e , the inverse square of distance effect) As applied to gamma (and X) rays, attenuation refers to the loss of photons (by the Compton, photoelectric, and pair-production effects) in the passage of the radiation through a material See Absorption, Inverse square law, Photon, Scattering
The act of attenuating; the act of making thin or less dense, or of rarefying, as fluids or gases
Weakening of the RF signal due to being partially blocked or absorbed Attenuation is heavily dependent on the frequency of the RF transmission and on the physical characteristics of the material that the transmission interacts with For example, high frequency microwave transmissions are severely attenuated by rain, but lower frequency cellular transmissions are not
the diminuation of quantity In the case of visibility, attenuation or extinction refers to the loss of image-forming light as it passes from an object to the observer
The measure of the weakening of a signal (loss) that occurs as it travels through a device or transmission medium (e g radio waves through the atmosphere, an electrical signal through a cable) Attenuation is usually measured in decibels
The process of reduction of a compound's concentration over time This can be through absorption, adsorption, degradation, dilution or transformation Attrition The action of one particle rubbing against the other in a filter media or ion exchange bed that can in time cause breakdown of the particles
The decrease in magnitude of a signal as it travels through any transmitting medium, such as a cable or circuitry Attenuation is measured as the logarithm of a ratio It is expressed in decibels or dB
The decrease in signal strength along an electrical or optical cable Attenuation is caused by a combination of absorption and scattering, and is usually expressed in decibels per kilometer (dB/km)
When you throw a pebble in a pond, it makes waves on the surface that move out from the place where the pebble entered the water The waves are largest where they are formed and gradually get smaller as they move away This decrease in size, or amplitude, of the waves is called attenuation
To attenuate something means to reduce it or weaken it. You could never eliminate risk, but preparation and training could attenuate it. to make something weaker or less
To reduce the amount of energy contained in an electrical or radio frequency signal Also, to reduce the intensity or level of sound waves Back to top Balanced Circuit A signal-carrying circuit with two active electrical conductors of equal impedance on which equal, but oppositely-phased signal components may exist Usually both conductors are enclosed within an overall metallic shield, which does not carry the signal Widely used to reduce the pickup of hum and noise in audio system cabling Also referred to as a balanced line