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shadow attenuation

См. также в других словарях:

  • Shadow loss — In telecommunication, the term shadow loss has the following meanings: # The attenuation caused to a radio signal by obstructions in the propagation path. # In a reflector antenna, the relative reduction in the effective aperture of the antenna… …   Wikipedia

  • Head shadow — A head shadow is a region of reduced amplitude of a sound because it is obstructed by the head. Sound may have to travel though and around the head in order to reach an ear. The obstruction caused by the head can account for a significant… …   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

  • Medical radiography — Diagnostics ICD 10 PCS B?0, B?1, B?2 ICD 9 CM 87 …   Wikipedia

  • Sauron — This article is about a fictional character from J. R. R. Tolkien s Middle earth fantasy writings. For other uses, see Sauron (disambiguation). Sauron Tolkien s legendarium character Aliases Annatar, Gorthaur the Cruel, Thû, The Necromancer,… …   Wikipedia

  • Speed of sound — Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In SI Units with dry air at 20 °C (68 °F), the speed of sound is 343 m/s. This… …   Wikipedia

  • Fading — This article is about signal loss in telecommunications. For the poetry book, see Fading (book). For other uses, see Fade (disambiguation). Frequency selective time varying fading causes a cloudy pattern to appear on a spectrogram. Time is shown… …   Wikipedia

  • arts, East Asian — Introduction       music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature.       Some studies of East Asia… …   Universalium

  • Biblical Hebrew — Biblical Hebrew, Classical Hebrew שְֹפַת כְּנַעַן, יְהוּדִית, (לְשוֹן) עִבְרִית …   Wikipedia

  • Hounsfield scale — The Hounsfield scale is a quantitative scale for describing radiodensity. DefinitionThe Hounsfield unit (HU) scale is a linear transformation of the original linear attenuation coefficient measurement in one in which the radiodensity of distilled …   Wikipedia

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