- Total of all sources of interference in a system used for the
production, detection, measurement, or recording of a signal,
independent of the presence of the signal.
- Noise from all sources unrelated to a particular sound that is the object of
interest. Background noise may include airborne, structureborne, and instrument
noise.
Source:
http://www.owenscorning.com/around/sound/glossary.asp
[[Category: Acoustics]]