Look up: attenuation

1. attenuation
   (communications) The progressive reduction in amplitude of a signal as it travels farther from the point of origin. For example, an electric signal's amplitude reduces with distance due to electrical impedance. Attenuation is usually measured in decibels [per metre?]. Attenuation does not imply app...
   Found on http://foldoc.org/attenuation
   
   
2. Attenuation
   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.
   Found on http://www.epa.gov/OCEPAterms/
   
   
3. Attenuation
   The loss or dissipation of wave energy, resulting in a reduction of wave height (AMPLITUDE).
   Found on http://www.ecy.wa.gov/programs/sea/swces
   
   
4. Attenuation
   Reduced virulence of a micro-organism, usually brought about by passage through a succession of abnormal hosts. or due to overgrowth of non-virulent strains in laboratory cultures. Attenuated strains are often used as vaccines. Also a process that plays a role in the regulation of enzymes involved in amino acid biosynthesis.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
5. Attenuation
   The decrease in magnitude of a wave, or a signal, as it travels through a medium or an electric system. It is usually measured in decibels (dB).
   Found on http://www.zoo.co.uk/~z0001325/Glossary.
   
   
6. attenuation
   [n] - weakening in force or intensity 2. [n] - the property of something that has been weakened or reduced in thickness or density
   Found on http://www.webdictionary.co.uk/definitio
   
   
7. Attenuation
   A making smaller: reduction of electrical or acoustic signal strength.
   Found on http://www.testing1212.co.uk/a.htm
   
   
8. Attenuation
   Is the reduction in amplitude and intensity of a signal with respect to distance traveled through a medium. Attenuation is usually measured in units of decibels per centimetre of medium (dB/cm) and is represented by the attenuation coefficient of the medium in question.
   Found on http://www.greenconstruction.co.uk/gloss
   
   
9. Attenuation
   The noise reduction achieved by control measures in dB.
   Found on http://www.encyclo.co.uk/local/20474
   
   
10. Attenuation
    (NETWORK GLOSSARY) Loss of communication signal energy.
    Found on http://www.instrument-net.co.uk/newworkg
    
    
11. Attenuation
    The reduction in amplitude of an electrical signal due to a transmission line or other network.
    Found on http://www.wavecor.co.uk/gloss.htm
    
    
12. Attenuation
    A reduction in the the amount of some quality such as signal level. The property exhibited by attenuators. The opposite of amplification.
    Found on http://www.traditionalmusic.co.uk/music%
    
    
13. Attenuation
    The decrease in amplitude of a signal between any two points in a circuit. Usually expressed in decibels. Attenuation is the opposite of amplification.
    Found on http://www.agbnielsen.net/glossary/gloss
    
    
14. Attenuation
    Attenuation is the decrease in the strength of a signal over the length of a cabling channel and attenuation is caused by a loss of electrical energy in the resistance of the cabling channel and by leakage of energy from the channel. This loss of energy is expressed in decibels (dB). Lower attenuation values correspond to better channel performance. For example, when comparing the performance of two cables at a particular frequency, a channel with an attenuation of 10 dB performs better than a channel with an attenuation of 20 dB. (see page 45) Channel attenuation is determined by the channel and cross connect construction, length, and the frequencies of thesignals sent through the channel. At higher frequencies the skin effect and inductance and capacitance cause attenuation to increase.
    Found on http://www.encyclo.co.uk/visitor-contrib
    
    
15. Attenuation
    A loss measure for voltage, current or power (optical or electrical). The loss in optical power along an optical fibre is measured in dB/km, and should be quoted at a specified light wavelength. Beware when converting linear ratios to dB, which is a logarithmic ratio. The tables for voltages and currents are different from those referring to power.
    Found on http://www.encyclo.co.uk/visitor-contrib
    
    
16. Attenuation
    Attenuation is the reduction of a physical quantity, the opposite of amplification. Within acoustics and structural dynamics it is normally presented as the logarithm of input dividedby output.In electronics it is the the degree to which an input signal is reduced in amplitude at the output of a cir...
    Found on http://www.diracdelta.co.uk/science/sour
    
    
17. Attenuation
    Sound reduction. 
    Found on http://www.encyclo.co.uk/local/20698
    
    
18. Attenuation
    An adjustment of the signal amplifier response which results in the reduction of the electronic signal
    Found on http://www.encyclo.co.uk/local/20747
    
    
19. attenuation
    the diminution of energy of a particular mode, with travel range, of an ultrasonic beam, arising from the combined effects of absorption, scattering, and geometric beam spread Category: Physics • where observations on bivariate material are subject to errors of measurement the true corre...
    Found on http://www.mijnwoordenboek.nl/definition
    
    
20. Attenuation
    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.
    Found on http://www.encyclo.co.uk/visitor-contrib
    
    
21. Attenuation
    At·ten`u·a'tion noun [ Latin attenuatio : confer French 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, ...
    Found on http://www.encyclo.co.uk/webster/A/142
    
    
22. attenuation
    <radiobiology> Process by which a beam of radiation is reduced in intensity when passing through material - combination of absorption and scattering processes, leading to a decrease in flux density of beam when projected through matter. ... (16 Dec 1997) ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
23. attenuation
    noun the property of something that has been weakened or reduced in thickness or density
    Found on http://wordnetweb.princeton.edu/perl/web
    
    
24. attenuation
    fading noun weakening in force or intensity; `attenuation in the volume of the sound`
    Found on http://wordnetweb.princeton.edu/perl/web
    
    
25. attenuation
    (ә-ten″u-a´shәn) the act of thinning or weakening. the change in the virulence of a pathogenic microorganism induced by passage through another host species, decreasing its virulence for the native host and increasing it for the new host. This is the basis for the development of live vacc...
    Found on http://www.encyclo.co.uk/local/21001