We know that we can use electromagnetic disturbances to infer the location of (moving) objects. See e.g. http://www.extremetech.com/extreme/133936-using-wifi-to-see-...
It someone cranked up the Wifi senders, they might have just microwaved their brains.
Of course rather than WiFi they could have used anything around the 2.4G Hz band.
EM makes more sense to me than ultrasound.
We know that we can use electromagnetic disturbances to infer the location of (moving) objects. See e.g. http://www.extremetech.com/extreme/133936-using-wifi-to-see-...
It someone cranked up the Wifi senders, they might have just microwaved their brains.
Of course rather than WiFi they could have used anything around the 2.4G Hz band.
EM makes more sense to me than ultrasound.