CPI Audio & Video Evidence Review 3

Question 1

Which audio file format preserves the highest fidelity for EVP evidence and is recommended for archiving?

Accepted Answer

WAV (PCM uncompressed)

Answer

WAV (PCM) is an uncompressed format that retains all original audio data without the lossy artifacts introduced by formats like MP3 or AAC.

Question 2

When an investigator reviews video and notices a bright streak moving across the frame, what is the most likely mundane explanation before attributing it to the paranormal?

Accepted Answer

An insect flying close to the camera lens and reflecting IR light

Answer

Insects flying near the camera lens are a very common source of bright moving streaks on IR night-vision footage and should always be ruled out first.

Question 3

What is 'spectral analysis' used for in paranormal audio evidence review?

Accepted Answer

Visualizing the frequency content of a recording to identify anomalies not audible to the ear alone

Answer

A spectrogram (spectral analysis) displays frequency versus time, allowing reviewers to spot voice-shaped patterns or anomalous sounds that may be outside normal hearing range.

Question 4

Which phenomenon causes digital video to show brief rectangular blocks or frozen frames, and could be misinterpreted as a paranormal event?

Accepted Answer

Codec compression artifacts (macroblocking)

Answer

Macroblocking occurs when a digital video codec lacks sufficient data to encode a scene, producing pixelated rectangular blocks that can resemble apparitions if the reviewer is unfamiliar with the artifact.

Question 5

Why should investigators avoid whispering during an EVP recording session?

Accepted Answer

Whispers can be picked up at low volume and later misidentified as EVP responses

Answer

Whispered voices from investigators can be captured by sensitive recorders and later mistaken for disembodied EVP responses during review.

(CPI) Certified Paranormal Investigator Practice Test

(CPI) Certified Paranormal Investigator Practice Test

CPI Audio & Video Evidence Review 3