people detectors

My new book on infrastructure tells an easy way to discern between AC and DC high power lines:

"DC transmission lines sound quite different from AC ones. They click and crackle rather than buzz; the DC line sounds just like a Geiger counter. And when you walk under the conductors, the pace of the clicking accelerates, as if you were radioactive."

Forget cancer, or sterility, or even the pervasive hum. Our grid is watching us.