CLASS A EVP
This type of recording is very clear. People in the immediate vicinity can make out the words used by the spirit, and it’s heard with your unaided ears. There is no need to play back the audio. Class A EVPs usually go with a highly active, intelligent haunting.
CLASS B EVP
The most common type of EVP. The investigator may not hear it in real-time; it’s heard during audio playback. In most cases, you can make out the words after listening to the data a few times. You shouldn’t have to strain to understand the words. Many times, the Class B EVP is a name, laughter,
CLASS C EVP
Also very common, but the sounds may not be clear. The recording may sound like whispers or murmurs. You have to use high-powered audio filters and amplifiers to get something understandable from the data.
CLASS D EVP
We usually debunk most Class D EVPs as background noise. Many times, it’s your mind matrixing the audio. If we can’t make the data out, we generally disregard this type of phenomenon.