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DC killer just one of many ‘ELF’ paranoids

“Extremely low frequency” waves — which Washington Navy Yard mass murderer Aaron Alexis blamed for his Sept. 16 rampage — are all around us.

They’re generated by electric-power lines, computers, electric blankets and even lightning — and most electric appliances expose us to electromagnetic radiation.

Now ELF has gotten new attention in the wake of Alexis’ killing spree.

Scientists say the radiation from ELF waves is too small to be dangerous.

But that hasn’t stopped conspiracy nuts from claiming for years that ELF has been weaponized by the government.

Some crazies have called an Alaskan research facility — financed in part by the Pentagon — an ELF generator designed to control minds. It was featured on the TV show “Conspiracy Theory with Jesse Ventura.”

Alexis blamed ELF mind control for his attack, according to the FBI.

He carved “My ELF weapon!” into the shotgun he turned on workers. ­“Ultra- low-frequency attack is what I’ve been subject to for the last three months, and to be perfectly honest that is what has driven me to this,” the FBI said he wrote.

In about an hour, the Brooklyn-bred former Navy reservist-turned-civilian contractor killed 12 people before he was slain in a shootout with law-enforcment authorities.

Meanwhile, officials said more than 6,000 Navy Yard workers have been offered counseling since the massacre.