Electronic Voice Phenomenon or EVP for short is where voices and noises sometimes not heard by the human ear are recorded on various electronic devices such as audio cassette recorders, digital audio recorders, audio from video recorders and so on.

How these voices actually get onto the media for us to be able to play back when we did not hear it with our ears is still up for debate. TIPS has a theory that the energy given off by an object projecting itself in the form of a voice or noise communication my actually modulate the pickup sensor (dynamic mic, electret condenser microphone, etc) using low level magnetic or RF (radio frequency) energy.

Our ears are designed to pick up vibrations and differences in pressure which is then converted to an electrical stimulus in our cochlea and transmitted to our brains for interpretation. Our ears can hear roughly between 50 and 30,000 Hertz of frequency bandwidth. But that bandwidth consists of vibrations in the air. Did you also know that radio transmitters can also send out signals in the same frequency range? Government and other entities (pardon the pun) have been using VLF (Very Low Frequency) transmitters for decades. One application is for transmitting signals to submarines deep within the oceans where standard HF and VHF radio signals cannot penetrate.

Thinking about VLF radio signals, being magnetic in nature, is it not possible that a spirit or entity could give off magnetic frequencies similar to standard audible frequencies except they are RF instead? If that were the case, this magnetic energy would interact with the pickup sensor of a recording device in almost the same way as audible frequencies do with the exception of not being able to physically hear it without aid.