General EVP Classifications used by  Mountain Peak Paranormal Investigations.

Sample EVP naming convention: 

Classification	Type of Communication	Sound Level
A	DC	1

Classification A

"A clear and distinct voice or sound that is universally accepted and undisputed, because it must be understood by anyone with normal hearing and without being told or prompted to what is being said or heard. It can be heard without the use of headphones."

Classification B

"A voice or sound that is distinct and fairly loud. This class of voice is more common and can be heard by most people after being told what to listen for. It is usually audible to experienced persons who have learned the skill of listening to EVP. It can sometimes be heard without the use of headphones."

Classification C

"A faint and whispery voice or sound that can barely be heard and is sometimes indecipherable and unintelligible. It may have paranormal characteristics, such as a mechanical sound. Usually can only be heard with amplified headphones, or by modifying the volume of the original sound file.

Type of Communication

Type DC (direct communication): The ghost voice clearly answers a question or directly responds to something said.

Type PC (personal communication): The ghost voice clearly says something meaningful directly to someone present.

Type RC (random communication): A ghost voice that answers no direct question, does not appear to be aimed at any particular person and doesn't make sense in the context it was receive

Sound Level

Level 1: Loud, clear and easy to understand...sounds like natural speech (including whispers and fast speech).

Level 2: Lower volume and the voice is warped, but still discernable.

Level 3: Very low volume, hard to understand and excessively warped.