[cwmoore]

Correct pattern for the correct time span matching random fluctuations in the electrical grid.

[kumarvvr]

I think that will be handled by the AC to DC conversion in most systems.

[4gotunameagain]

Nope. Mains hum is picked up by microphones as well as light intensity:

https://en.wikipedia.org/wiki/Electrical_network_frequency_a...