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Definition of Attenuation

Babylon English

reduction; weakening; decrease; diminution; being weakened; weakening of a signal as the length of a network cable increases (Computers)
Attenuation Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
The process of weakening in intensity; diminution of virulence; as, the attenuation of virus.
The act or process of making slender, or the state of being slender; emaciation.
The act of attenuating; the act of making thin or less dense, or of rarefying, as fluids or gases.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version

\at*ten`u*a"tion\ (&?;), n. [l. attenuatio: cf. f. atténuation.]
1. the act or process of making slender, or the state of being slender; emaciation.
2. the act of attenuating; the act of making thin or less dense, or of rarefying, as fluids or gases.
3. the process of weakening in intensity; diminution of virulence; as, the attenuation of virus.

JM Welsh <=> English Dictionary
Teneuad = n. attenuation
WordNet 2.0

1. weakening in force or intensity; "attenuation in the volume of the sound"
(synonym) fading
(hypernym) weakening
(derivation) attenuate
2. the property of something that has been weakened or reduced in thickness or density
(hypernym) weakness
(derivation) rarefy, attenuate
Attenuation Definition from Government Dictionaries & Glossaries
DOD Dictionary of Military Terms
(*) 1. Decrease in intensity of a signal, beam, or wave as a result of absorption of energy and of 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. 2. In mine warfare, the reduction in intensity of an influence as distance from the source increases. 3. In camouflage and concealment, the process of making an object or surface less conspicuous by reducing its contrast to the surroundings and/or background. Also called tone down.
Source: U.S. Department of Defense, Joint Doctrine Division. ( About )
Attenuation Definition from Science & Technology Dictionaries & Glossaries
Glossary of Marine Biology
Diminution of light intensity; explained,in the ocean,in terms of absorption and scattering
Telecommunication Standard Terms
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.
NRC Nuclear Energy Glossary
The process by which the number of particles or photons entering a body of matter is reduced by absorption and scattered radiation.
A service to the public by The U.S. Nuclear Regulatory Commission (NRC).
Technical English by wpv
The sound reduction process in which sound energy is absorbed or diminished in intensity as the result of energy conversion from sound to motion or heat.
Fiber Optics, Optical Networking Terms
1. In an optical fiber, the absorption of light by molecules in the fiber — causing some of the intensity of the light to be lost from the signal. Usually measured in dB/km. 2. The decrease in signal strength along a fiber optic waveguide caused by absorption and scattering.
Attenuation Definition from Computer & Internet Dictionaries & Glossaries
ATM Forum
as it passes through most media. Usually proportional to distance, attenuation is sometimes the factor that limits the distance a signal may be transmitted through a media before it can no longer be received.
Internet Glossary
Reduction of signal strength during transmission. Attenuation is the opposite of amplification, and is normal when a signal is sent from one point to another. If the signal attenuates too much, it becomes unintelligible, which is why most networks require repeaters at regular intervals. Attenuation is measured in decibels.

Attenuation Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
In physics, attenuation (in some contexts also called extinction) is the gradual loss in intensity of any kind of flux through a medium. For instance, dark glasses attenuate sunlight, lead attenuates X-rays, and water attenuates both light and sound.

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Attenuation Definition from Society & Culture Dictionaries & Glossaries
EPA Terms of Environment
The process by which a compound is reduced in concentration over time, through absorption, adsorption, degradation, dilution, and/or transformation. an also be the decrease with distance of sight caused by attenuation of light by particulate pollution.
Provided as a public service by the U.S. Environmental Protection Agency
Environmental Engineering (English ver.)
The process of reduction of a compound's concentration over time. This can be through absorption, adsorption, degradation, dilution or transformation.
Attenuation Definition from Entertainment & Music Dictionaries & Glossaries
The DJ Glossary
To reduce in signal level.
Stanton Magnetics
film and video
This refers to signal loss in a transmission system