Background Level

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Wikipedia English The Free EncyclopediaDownload this dictionary
Background level
Background level can refer to:Background (astronomy)Background radiation
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This article uses material from Wikipedia® and is licensed under the GNU Free Documentation License

WordNet 2.0 DictionaryDownload this dictionary
background level
Noun
1. the amplitude level of the undesired background noise
(synonym) noise level
(hypernym) amplitude



EPA Terms of Environment DictionaryDownload this dictionary
Background Level
1. The concentration of a substance in an environmental media (air, water, or soil) that occurs naturally or is not the result of human activities. 2. In exposure assessment the concentration of a substance in a defined control area, during a fixed period of time before, during, or after a data-gathering operation..

Provided as a public service by the U.S. Environmental Protection Agency

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