Hacker News Reader

I thought of that, but if I were making some secret military sound I would try very hard to blend in exactly like other whales, not do something unique and identifiable.

But this is 52Hz, just around the 50Hz that a big part of the world uses as electrical standard. Some hidden generator somewhere could cause it.

I guess the hardest part to explain (in an artificial source) is how it migrates all the time, not the pitch.

Unlikely that broken electricity generator would be as loud as a whale, and survive 30years without repair.

Also, would someone choose to generate AC in a marine application?

Thw wikipedia article mentions that the US Navy partially declassified thoe orginal recordings after the Cold War, and made the array availble to researchers.

If there was a military tech involved (with the source), I highly doubt they would have declassified that or as a conspiracy theory, it is misdirection...

Makes sense. Trying to mask an acoustic signature around 50-60Hz, by using a sound that ressembles to a whale.