CPI EVP Classification & Analysis 3

Question 1

What characteristic distinguishes a Class C EVP from Classes A and B?

Accepted Answer

It is extremely faint, heavily disputed, and often unintelligible even after processing

Answer

Class C EVPs are the lowest quality designation—so faint or distorted that listeners routinely disagree on content, making them weak evidence.

Question 2

An EVP analyst uses a spectrogram to review a recording. What axis typically represents time in a standard spectrogram display?

Accepted Answer

Horizontal (X) axis

Answer

In a standard spectrogram, the horizontal X-axis represents time, the vertical Y-axis represents frequency, and color or brightness represents amplitude.

Question 3

During evidence review, an EVP appears to directly answer a question asked by an investigator two seconds earlier. This type of EVP is often categorized as which specialized subtype?

Accepted Answer

Intelligent or interactive EVP

Answer

An EVP that responds contextually to a question is classified as intelligent or interactive, suggesting real-time awareness rather than a residual loop.

Question 4

Which audio editing practice is considered unethical and inadmissible under standard paranormal investigation evidence protocols?

Accepted Answer

Adding reverb or echo effects to enhance perceived voice quality

Answer

Adding reverb, echo, or other creative effects to an EVP recording alters the evidence and constitutes manipulation, rendering it inadmissible.

Question 5

What is the recommended minimum sample rate for EVP capture to adequately represent the full range of human speech frequencies?

Accepted Answer

44,100 Hz (44.1 kHz)

Answer

44.1 kHz is the CD-quality standard that captures frequencies up to 22 kHz, well beyond the upper limit of human speech and hearing.

(CPI) Certified Paranormal Investigator Practice Test

(CPI) Certified Paranormal Investigator Practice Test

CPI EVP Classification & Analysis 3