specific attenuation

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• Attenuation — This article is about attenuation in physics. For other uses, see Attenuation (disambiguation). 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 …   Wikipedia

• Attenuation coefficient — For attenuation coefficient as it applies to electromagnetic theory and telecommunications see propagation constant. For the mass attenuation coefficient , see the article mass attenuation coefficient. The attenuation coefficient is a quantity… …   Wikipedia

• attenuation — 1. The act of attenuating. 2. Diminution of virulence in a strain of an organism, obtained through selection of variants that occur naturally or through experimental means. 3. Loss of energy of a beam of radiant energy due to absorption,… …   Medical dictionary

• Computation of radiowave attenuation in the atmosphere — One of the causes of attenuation of radio propagation is the absorption by the atmosphere. There are many well known facts on the phenomenon and qualitative treatments in textbooks.[1] A document published by the International Telecommunication… …   Wikipedia

• Single Vegetative Obstruction Model — The ITU Single Vegetative Obstruction Model is a Radio propagation model that quantitatively approximates the attenuation due to the vegetation in the middle of a telecommunication link. Applicable to/under conditionsThe model is applicable to… …   Wikipedia

• One Woodland Terminal Model — The ITU Terrestrial Model for One Terminal in Woodland is a Radio propagation model belonging to the class of Foliage models. This model is a successor of the Early ITU Model. Contents 1 Applicable To / Under Conditions 2 Coverage 3 Mathematical… …   Wikipedia

• sound — sound1 soundable, adj. /sownd/, n. 1. the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. 2. mechanical vibrations transmitted through an elastic medium, traveling in air at a… …   Universalium

• Sound — /sownd/, n. The, a strait between SW Sweden and Zealand, connecting the Kattegat and the Baltic. 87 mi. (140 km) long; 3 30 mi. (5 48 km) wide. Swedish and Danish, Oresund. * * * I Mechanical disturbance that propagates as a longitudinal wave… …   Universalium

• telecommunications media — Introduction       equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation       Every… …   Universalium

• Oncolytic virus — An oncolytic virus is a virus that preferentially infects and lyses cancer cells; these have obvious functions for cancer therapy, both by direct destruction of the tumour cells, and, if modified, as vectors enabling genes expressing anticancer… …   Wikipedia

• Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …   Wikipedia