attenuation coefficient

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attenuation coefficient

A measure of the attenuation of energy waves or particles caused by absorption of energy as they pass through a particular medium (e.g., air, tissue, lead).

attenuation coefficient

The calculated remainder of the x-ray beam that is received by the detectors in a computed tomography (CT) unit. This value is used to determine the CT (Hounsfield) number.
See also: coefficient
References in periodicals archive ?
It is associated with attributes such as data security, electrical isolation, low attenuation rate; reduced cost, size, and weight; and increased bandwidth and electromagnetic interference immunity.
An increase in air temperature can cause an increase in the attenuation rate of the fiber and produce a finer filament.
The attenuation rate of PSV increased first and then decreased.
In Figure 10, at distances of 50-200 m from the blast area to the vibration monitoring point, the attenuation rate for the dolomite and shale blasting is lower in the primary influence frequency band than in the secondary influence frequency band.
Prammer [52] presented the relation between the amplitude attenuation of NMR and the transverse relaxation time ([T.sub.2]) and pointed out that the fluid viscosity is correlated positively with the attenuation rate of fluid amplitude.
In the present paper, an innovative method is developed for reconstructing distribution of the attenuation rate inside a reinforced concrete element from single-side measurements of AE activity.
It shows that the drag coefficient decreased as the waves decay under emergent conditions which resulted in reduction of the attenuation rate. It was observed that the [C.sub.d] decreased with increasing Re.
Thus, the expected attenuation rate of electromagnetic waves in a frequency band should be estimated when judging whether the use of RIM is justified in an exploration of the problem.
To obtain the power attenuation rate, the attenuation constant of the composite electrical field, E = [square root of [E.sup.2.sub.x] + [E.sup.2.sub.y] + [E.sup.2.sub.z], must be calculated.
The attenuation rate at the passband to stopband transition knee on the lower side of the stopband is 320 dB/GHz (attenuation: 12.2 dB at 1.30 GHz and 50.6 dB at 1.42 GHz), while on the upper side of the stopband it is 208.75 dB/GHz (attenuation: 31.2dB at 4.12GHz and 14.5dB at 4.2GHz).