Sources of noise/background noise
State the sources of noise or background noise
that can be found in the recorded
signals: noise produced by the host computer/sound card,
spinning disks, ventilation, noise caused by cellular phones, by
fluorescent lights, 50/60 Hz hum, typical office/home/street
noise, machines etc.
The protocol also should contain a differentiation as to whether
the background noise is real or artificially produced by play-back.