Introduction

Audio is one of the most valuable — and most misinterpreted — forms of paranormal evidence. Capturing unexplained voices or sounds, known as Electronic Voice Phenomena (EVP), has been a cornerstone of ghost hunting for decades.

In this lesson, you’ll learn the tools, techniques, and pitfalls of collecting audio evidence, plus how to review and present it in a way that boosts your credibility.

What is an EVP?

An EVP is a sound, word, or voice recorded on audio devices that wasn’t heard at the time of recording.

  • Class A EVP – Clear and easily understood by most listeners.

  • Class B EVP – Audible but open to interpretation.

  • Class C EVP – Faint, unclear, often requiring amplification.

Essential Tools for Audio Capture

1. Digital Audio Recorder

  • Purpose: Captures EVPs and ambient sound.

  • Tip: Use one with minimal background hiss; avoid voice-activated modes, as they can cut off faint responses.

2. External Microphones (Optional)

  • Reduce handling noise and improve clarity.

3. Spirit Box / Ghost Box

  • How It Works: Rapidly scans AM/FM radio frequencies, creating bursts of white noise through which some believe spirits can communicate.

  • Caution: Radio chatter can produce false positives — always document your scan settings.

4. Parabolic Microphone (Advanced)

  • Focuses on sounds from a specific direction, useful for outdoor investigations.

Recording Techniques

1. Baseline Recording

  • Start with a few minutes of silence to capture the normal background sounds of the location.

2. Controlled EVP Sessions

  • Ask clear, direct questions — one at a time.

  • Pause 10–15 seconds between questions for responses.

3. Tagging Sounds

  • Verbally note any noises you or the team make during recording (“That was John coughing”).

  • Prevents confusion during review.

4. Multiple Devices

  • Record on two or more devices in different locations — helps verify if a sound is location-specific or general.

Reviewing Audio Evidence

1. Use Headphones

  • Quality headphones reveal faint sounds missed on speakers.

2. Slow and Steady

  • Review in real-time first; then replay suspicious sections slowed down.

3. Avoid Over-Editing

  • Light filtering is fine; too much processing can create false patterns in noise.

4. Peer Review

  • Have another investigator listen without telling them what you think it says — this helps prevent suggestion bias.

Common Audio False Positives

  • Whispered conversation from another room.

  • Radio interference.

  • Insects, wind, or rustling clothing.

  • Audio compression artifacts from cheap recorders.

Case Study

During an investigation of an old schoolhouse, a recorder picked up what sounded like a child laughing. The team was excited — until review revealed the sound occurred exactly when a creaky door was opened in another room. The “laugh” was a distorted hinge noise.

Action Step Before Moving On

  • If you have a recorder, try a 5-minute EVP session in a quiet location.

  • Ask three clear questions, leaving space for responses.

  • Review the recording and note anything unusual — but also note all possible natural explanations.

Closing

Audio evidence can be powerful, but only when captured and reviewed with care. The next lesson, 3.4 – Video & Photography for Investigations, will show you how to capture visual evidence while avoiding the traps of false positives like dust, reflections, and light flares.

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