CPI Evidence Collection & Analysis 2 — Questions and Answers
Question 1: When analyzing audio recordings for EVP (Electronic Voice Phenomena), which frequency range is most commonly associated with captured paranormal voices?
- 20 Hz–200 Hz
- 200 Hz–1,500 Hz (Correct answer)
- 1,500 Hz–3,000 Hz
- Above 10,000 Hz
Correct answer: 200 Hz–1,500 Hz
EVP voices most often appear in the 200 Hz–1,500 Hz mid-range, which overlaps human speech frequencies.
Question 2: A paranormal investigator discovers a cold spot in a room. What is the first scientifically rigorous step before attributing it to paranormal activity?
- Immediately capture video of the area
- Rule out natural causes such as drafts, vents, or poor insulation (Correct answer)
- Record an EVP session in the cold spot
- Mark it as confirmed paranormal evidence
Correct answer: Rule out natural causes such as drafts, vents, or poor insulation
Debunking natural explanations first is a foundational principle of credible paranormal investigation.
Question 3: Which type of camera setting is most recommended for capturing potential paranormal activity in near-total darkness?
- Maximum zoom, auto exposure
- Full-spectrum or infrared with wide aperture (Correct answer)
- Standard daylight white balance
- Slow shutter speed with flash
Correct answer: Full-spectrum or infrared with wide aperture
Full-spectrum and infrared cameras capture light wavelengths invisible to the naked eye, making them ideal for dark environments.
Question 4: What does the term 'contamination of evidence' mean in a paranormal investigation context?
- Evidence damaged by water
- Introduction of non-paranormal factors that can explain or corrupt potential evidence (Correct answer)
- Evidence collected without written permission
- Audio files corrupted by software errors
Correct answer: Introduction of non-paranormal factors that can explain or corrupt potential evidence
Contamination refers to anything mundane—noise, movement, equipment malfunction—that could falsely appear as paranormal evidence.
Question 5: When using a digital voice recorder for EVP capture, why should investigators avoid whispering?
- Whispering damages the microphone
- Whispers can be misidentified as EVPs during review (Correct answer)
- Whispering reduces battery life significantly
- Whispering creates electromagnetic interference
Correct answer: Whispers can be misidentified as EVPs during review
Whispers are acoustically similar to EVP voices and can be mistakenly logged as paranormal audio evidence.
Question 6: What is a 'control recorder' used for during a paranormal investigation?
- A recorder kept by the team leader to log commands
- A second recorder placed in an uninvestigated room to identify ambient noise sources (Correct answer)
- A backup device in case the primary fails
- A recorder used exclusively for interview sessions
Correct answer: A second recorder placed in an uninvestigated room to identify ambient noise sources
A control recorder captures ambient sounds in an undisturbed area so investigators can compare and isolate true anomalies.
Question 7: Which of the following is considered a Class A EVP?
- A voice audible only after heavy audio filtering
- A clear, distinct voice easily heard and understood without enhancement (Correct answer)
- A rhythmic sound pattern with no identifiable words
- A voice heard only by one investigator on playback
Correct answer: A clear, distinct voice easily heard and understood without enhancement
Class A EVPs are the highest quality—clearly audible, intelligible, and require no audio processing to recognize.
CPI Evidence Collection & Analysis 2
When analyzing audio recordings for EVP (Electronic Voice Phenomena), which frequency range is most commonly associated with captured paranormal voices?