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field level

Logarithm of the ratio of two values of a field quantity, usually amplitude. Levels are expressed in different ways: L F = ln ( F F 0 ) N p, where N p is the symbol for the unit neper coherent with the SI, or L F = 20 log 10 ( F F 0 ) dB, where dB is the symbol for the unit decibel.
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
Last update: 2014-02-24; version: 2.3.3.
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