They where all pretty terrifying Ghost EVP & EMF Recordings!
Electronic Voice Phenomena is a method used by ghost hunters to capture a spirit/poltergeist/demons voice trough a recording device. Usually after series of questions the audio will be played back and analysed for paranormal evidence. Which sometime can be pretty conclusive!

An Electromagnet Field is a physical field produced by electrically charged objects which many ghost investigators believe paranormal entities give off. They can then use an EMF reader to communicate with the spirits by asking them to come into contact with the device.