background level

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  • noun

Synonyms for background level

the amplitude level of the undesired background noise


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References in periodicals archive ?
(9) we have a single expression for the observed profile in terms of the crystallite size distribution and shape, background level, and statistics of the experiment; information concerning the crystallite properties has been incorporated.
The exposure results (Figure 3) reveal that a single 6-hr inhalation exposure to a steady-state of 1 ppm acrolein in HEPA-filtered air was sufficient to increase acrolein--dG adduct levels in aortic DNA by about 5 times over background levels. Adduct levels in the 10 ppm group were slightly but not significantly increased (p [is greater than] 0.05) over those in the 1 ppm group.
The irreversible Me[SO.sub.2]-[[sup.14]C]DDE binding was confined to zona fasciculata, while zona glomerulosa, zona reticularis, and the adrenal medulla were devoid of bound radioactivity (above the background levels).
Therefore, we must know something about the background level of the chemical to which the increment added, as well as the background of similar chemicals that operate by the same mode of action.
The researchers measured the background level of stress in the babies using two approaches - heart rate variability and the level of cortisol in saliva.
The average over the 2-month period is 7.2 + 2.1 ppbv, about 10 times the average background level, the team reported December 16th at the American Geophysical Union and in Science.
It revealed a low background level of methane which spiked 10-fold over a period of just 60 Martian days.
"There have been very few incidents where there has been a below background level of NORM.
According to a Connecticut Department of Public Health publication, "Manganese in Drinking Water,'' "sources of pollution rich in organic matter (e.g., runoff from landfills, compost, brush or silage piles, or chemicals such as gasoline) can add to the background level by increasing manganese release from soil or bedrock into groundwater.''
These readings are of background level and do not indicate any release or leakage of radioactive material.
"The background level before loudspeakers were used was from about 59 to 61dB.
As for the rest, a certain background level of shambles is perhaps to be expectedatsuchahugeevent buttheproblemsyouname weresurelyavoidable.
"Despite increasingly stringent controls on our use of antibiotics, the background level of antibiotic resistant genes continues to rise in soils.
The samples just over the known Trilogy resource carried gold values up to 10 times the background level (highest value was 96ppb Au).A baseline study was also completed over the Railway prospect which is also located in Proterozoic terrain.
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