Background Noise
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Background Noise
1. In recording and reproducing, the total system noise independent
of whether or not a signal is present. The signal is not to be included as
part of the noise.
2. In receivers, the noise in the absence of signal modulation on the
carrier.
Ambient
noise detected, measured, or recorded with the signal part of the
background noise. Included in this definition is the interference resulting
from primary power supplies, that separately is commonly described as hum.
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
