alt Hacker NewsI'm curious about challenges (what's bad with AM broadcast in an unmanned tunnel?) and why the formally verified killswitch was necessary?
I'm curious about challenges (what's bad with AM broadcast in an unmanned tunnel?) and why the formally verified killswitch was necessary?
A tunnel basically acts as a waveguide. A sufficiently shaped AM transmission can turn the tunnel into a cavity resonator, basically a huge microwave oven. There have been multiple cases where people were cooked alive in mines and utility tunnels, due to faulty AM equipment broadcasting at the wrong resonant frequency.