The high-pitched growling noise that Francisco hears is due to mating call of male midshipman fish or 5G.
<h3>What is the hum about?</h3>
The Hum is known to be a kind of unexplained happenings that has brought a lot of irritations to people. It is known to be a high-pitched noise that brought a lot of scientific theories.
Studies has shown that the high-pitched growling noise that Francisco hears is as a result of mating call of male midshipman fish or 5G.
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