EVP recordings: what they are and how to record them with your phone

You record a silent room, you hear absolutely nothing… and when you put on headphones to review the audio, a voice appears whispering a word. That's an EVP, the most popular —and most debated— phenomenon in all of paranormal investigation. This is the complete guide to understanding them and recording your own, with judgment.

EVP are almost everyone's way into ghost hunting, because you don't need anything exotic: a microphone and patience are enough to start. But between a recording that genuinely thrills and a pile of misread noise lies a chasm, and that chasm is called method. Let's walk through all of it.

What are EVP?

An EVP (Electronic Voice Phenomena) is a sound, usually voice-shaped, that appears in a recording even though no one heard it at the moment of recording. The key is that last part: the phenomenon isn't perceived live, it's discovered afterward, when you review the audio carefully and, almost always, with headphones.

The term was popularized by the Swedish painter and producer Friedrich Jürgenson, who from 1959 onward claimed to have captured voices while recording birdsong. A decade later, the Latvian psychologist Konstantīns Raudive brought the idea to the wider public with thousands of recordings, to the point that for years these voices were known as "Raudive voices." Ever since, the EVP has been the cornerstone of field paranormal investigation.

How to record an EVP session step by step

A good EVP session is slow, orderly and boring to watch from the outside: that's exactly what makes it reliable. Here are the steps:

• Choose a quiet place and warn your companions that there will be silence.
• Silence the phone's notifications and keep it away from sources that vibrate or hum.
• Introduce the session out loud: say the location, date and time. That orders the recording and helps when you review it.
• Ask a clear question and, above all, leave the listening pause: 10 to 20 seconds of silence before the next one. The responses, if any, fall into that gap.
• Tag the noises: "car passing," "floor creaking," "I moved the chair." That way you won't mistake a normal sound for something extraordinary.
• Review afterward with headphones and lean on a spectrogram to see where there's real sound energy.

Below you have a little lab to experiment with the two key pieces: how sound looks on a live spectrogram and how to time the listening pause.

The three classes of EVP

Not all EVP are worth the same. The investigative community ranks them by clarity into three classes, and knowing them helps you stay honest with yourself about what you really captured.

Rule of thumb: if you have to tell someone what it's "supposed" to say before they hear it, it's probably a class C… and probably your brain filling in the gaps. Keep with pride only what survives a blind listen.

The biggest enemy: pareidolia and interference

The human brain is an extraordinary voice-recognition machine; so much so that it finds voices even where there are none. That phenomenon is called auditory pareidolia and it's the most common explanation for unclear EVP. If you expect to hear "get out," your mind will shape any ambiguous noise until it sounds like "get out." That's why a serious investigator never announces what they think will appear.

The second prime suspect is radio interference. Microphones and circuits can pick up fragments of AM/FM stations, walkie-talkies, baby monitors or cell signals. A "voice" that's really a scrap of radio is nothing paranormal. To minimize it:

• Keep the phone away from routers, chargers and other electronics.
• Record in short, well-tagged files; it's easier to discard the doubtful.
• Don't suggest answers or make others "hear" what you think you hear.
• Keep only what is clear and repeatable. When in doubt, discard it.

The spirit box: the most controversial tool

You may have seen the spirit box or "ghost box": a device that rapidly sweeps radio frequencies, creating a stream of choppy noise from which responses supposedly emerge. It's flashy and popular, but also the most criticized, precisely because it introduces real radio fragments into the session, the perfect breeding ground for pareidolia. If you use it, treat it as a complement and never as your only source: an EVP captured in dead silence will always be worth more than a stray word born from a sweep of stations. The spirit box in GhostTech: Experimental rebuilds the technique in a different way — using live speech recognition instead of real radio — so if you want to try the classic station-sweep, you'll need a separate physical device.

Common mistakes that ruin an EVP session

• Talking too much during the pauses and contaminating the recording with your own noise.
• Not leaving enough silence between questions: with no gap, there's nowhere for a response to land.
• Suggesting what will be heard before a blind listen.
• Recording next to radio sources and mistaking interference for voices.
• Keeping doubtful class C clips just because they fit what you wanted to hear.

Frequently asked questions about EVP

Conclusion

EVP are fascinating because anyone can try them and, at the same time, demanding because almost everything that sounds like a voice has a normal explanation. Master the listening pause, tag every noise, steer clear of radio and be your own harshest critic: that way, when you catch a class A that survives a blind listen, you'll know you really have something. With GhostTech's EVP engine and spectrogram you have the whole lab in your pocket to start today.

Remember: these tools are for entertainment and technical experimentation. An EVP is audio to interpret with judgment, not scientific proof of paranormal activity. Always investigate with respect, safety and critical thinking.