Attenuation

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, sunlight is attenuated by dark glasses, X-rays are attenuated by lead, and light and sound are attenuated by water.

In electrical engineering and telecommunications, attenuation affects the propagation of waves and signals in electrical circuits, in optical fibers, as well as in air (radio waves).

Read more about AttenuationBackground, Ultrasound, Light Attenuation in Water, Earthquake, Electromagnetic

Other articles related to "attenuation":

Characteristics of Line Filters
... For example, in equipment used in Radio Transmitter facilities The attenuation of Line filters is measured in 2 areas Common Mode - attenuation to signals that appear identically ...
Attenuation - Electromagnetic - Radio
... Attenuation is an important consideration in the modern world of wireless telecommunication ... Attenuation limits the range of radio signals and is affected by the materials a signal must travel through (e.g ...
Trp Operon - Attenuation
... Attenuation is a second mechanism of negative feedback in the trp operon ... transcription by a factor of 70, attenuation can further decrease it by a factor of 10, thus allowing accumulated repression of about 700-fold ... Attenuation is made possible by the fact that in prokaryotes (which have no nucleus), the ribosomes begin translating the mRNA while RNA polymerase ...
Summation (neurophysiology) - Current Research
... Modern studies of neural summation focus on the attenuation of postsynaptic potentials on the dendrites and the cell body of a neuron ... showed that spatial summation of excitatory and inhibitory postsynaptic potentials caused attenuation of the excitatory response during the inhibitory response most of the time ... They also noted a temporary augmentation of the excitatory response occurring after the attenuation ...
Mass Attenuation Coefficient - Defining Equations
... See also Beer–Lambert law The defining equation for the mass attenuation coefficient is essentially a different way to write the Beer-Lambert law ... into the substance, e is Euler's number, about 2.718, is the attenuation coefficient ... When discussing the mass attenuation coefficient, this equation is rewritten where is the density, is the mass attenuation coefficient and is the area density known also as mass thickness ...