1. A system for detecting a visually obscured object or an underground void, said system comprising: means for generating a first signal and a second signal from induced eddy currents; means for determining if the first signal is greater than the second signal, the first signal is less than the second signal, and if the first signal is approximately equal to the second signal; and means for determining the detection of the visually obscured object if the first signal is greater than the second signal, the detection of the underground void if the first signal is less than the second signal, and the non-detection of the visually obscured object or the underground void if the first signal is approximately equal to the second signal.