CPI EVP Classification & Analysis 2 — Questions and Answers
Question 1: Which EVP class designation is assigned to voices that are clearly audible, require no amplification, and can be understood by most listeners without coaching?
- Class C
- Class B
- Class A (Correct answer)
- Class D
Correct answer: Class A
Class A EVPs are the highest quality, clearly audible to most listeners without enhancement or prior suggestion.
Question 2: An investigator records audio near an active electrical panel during an EVP session. The resulting anomalous sounds are most likely attributed to what?
- Paranormal activity confirming a haunting
- Class A EVP captured near a power source
- EMF interference causing audio artifacts (Correct answer)
- Spirit box bleedthrough
Correct answer: EMF interference causing audio artifacts
Electromagnetic fields from electrical panels commonly induce false-positive audio artifacts in recording equipment.
Question 3: During spectral analysis of a suspected EVP, investigators notice the voice appears only in a very narrow frequency band around 1 kHz. What does this suggest?
- The EVP originated from a human-like source
- The recording may be contaminated by radio frequency interference (Correct answer)
- High-frequency spirit communication is more reliable
- The recorder's automatic gain control amplified a whisper
Correct answer: The recording may be contaminated by radio frequency interference
Natural human speech covers a broad frequency range; a very narrow band signal often indicates RFI or electronic interference rather than a genuine voice.
Question 4: What is the term for the psychological phenomenon where listeners perceive meaningful words in random noise, commonly misidentified as EVP?
- Apophenia
- Pareidolia
- Auditory pareidolia (Correct answer)
- Synesthesia
Correct answer: Auditory pareidolia
Auditory pareidolia causes the brain to find familiar patterns like voices within random audio noise, a leading cause of false EVP identification.
Question 5: A Class B EVP requires what additional step before it can be evaluated by a review panel?
- Submission to a government database
- Amplification or noise reduction to be intelligible to multiple listeners (Correct answer)
- Immediate discard as evidence
- Spirit box corroboration only
Correct answer: Amplification or noise reduction to be intelligible to multiple listeners
Class B EVPs are not immediately clear and typically require amplification or noise reduction before multiple listeners can assess the content.
Question 6: Which recording format is generally preferred for EVP capture because it avoids lossy compression artifacts that can mimic voice-like sounds?
- MP3 at 128 kbps
- AAC at 256 kbps
- Uncompressed WAV or FLAC (Correct answer)
- OGG Vorbis
Correct answer: Uncompressed WAV or FLAC
Uncompressed WAV or lossless FLAC files eliminate compression artifacts that could be falsely interpreted as EVP.
Question 7: When conducting a controlled EVP session, investigators should speak their own voices aloud for which primary reason?
- To summon spirits more effectively
- To establish a clear audio baseline that distinguishes investigator voices from anomalies (Correct answer)
- To prevent equipment malfunction
- To comply with CPI evidence submission rules requiring verbal timestamps only
Correct answer: To establish a clear audio baseline that distinguishes investigator voices from anomalies
Verbally logging all investigator activity creates a reference track that allows analysts to rule out known voices when reviewing recordings.
CPI EVP Classification & Analysis 2
Which EVP class designation is assigned to voices that are clearly audible, require no amplification, and can be understood by most listeners without coaching?