WordNet
n. the amplitude level of the undesired background noise [syn: noise level]
Wikipedia
Background level may refer to:
- Background (astronomy)
- Background radiation
- Journalism sourcing
Usage examples of "background level".
Some other groups observed a few, a very few, neutrons, barely more than the normal background level.
The thermal radiation leaving a black hole with that temperature would be completely swamped by the general background level of radiation in the universe.
The first particle wave had arrived, swelled to a peak, and as swiftly subsided to its steady background level.
The effects everywhere else would be way below the natural background level that exists anyway.
Of course, there's a background level of radio noise from Earth-radio and television stations, aircraft, portable telephones, nearby and more distant spacecraft.
And it was no return to a past life because he saw Yellow Cabs - it was truly modern, a big city such as Mexico City itself, very busy, very noisy, but with the sounds somehow muted and at a constant background level of murmuring.