The sum of all these lightning flashes results in atmospheric noise.
2.
The atmospheric noise depends on frequency, location and time of day and year.
3.
Example sources include measuring atmospheric noise, thermal noise, and other external electromagnetic and quantum phenomena.
4.
"' Atmospheric noise "'is radio noise caused by natural atmospheric processes, primarily lightning discharges in thunderstorms.
5.
Random . org generates unpredictable sequences of data using a radio tuned between stations, harvesting the atmospheric noise.
6.
If there is tape hiss, atmospheric noise or belching in the background, they consider it all just another instrument.
7.
The requirements for receiving antennas are less stringent, because the transmitter power is generally high to overcome atmospheric noise.
8.
Atmospheric noise and not receiver noise determines the receiver signal to noise ratio, so small inefficient receiving antennas can be used.
9.
As Belarmino moves through the streets, we hear not atmospheric noise but the sounds of a screening in a cinema auditorium.
10.
Therefore, at very low frequency and low frequency, atmospheric noise often dominates, while at high frequency, man-made noise dominates in urban areas.
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