I'm on 98. A bit south of Allenhurst GA, we passed through what appeared to be a metal shed. It caught me off guard, but I did notice what looked like an array of large LEDs just before exiting the shed. Is this some type of new advanced defect detector? On the scanner, I heard the usual CSX no defects recording, but in an unfamiliar female voice. It followed closely after one in the usual male voice.