These are the sightings that can be coroborated through scientific or physical documentation, such as photographs, sound recordings, video tapes, or other scientific methods. EVP, or electronic voice phenomena, while not exactly a ghost, falls into this catagory.
EVP has gained much recognition in the past few years as one of the newest, and most strange paranormal occurences.In an EVP occurence, sensitive listening and recording devices are placed in appropriate places, such as mausoleums or greatly disturbed sites. A constant recording is made during an entire night, and many times, as the tape is analyzed, strange, fragmented voices can be heard very faintly on the tape, as if from speaking from a far-off place. Every precaution is taken to ensure that there is no chance of interference from any outside source. Yet the voices are there. Science still has no explanation.