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Electronic Voice Phenomenon (EVP) - The term used to describe voices and/or sounds on some type of voice recorder.
Sara Estep has developed a system for grading EVP.
Class A - EVP is a message that can be heard without headphones and that people can generally agree on its content.
Class B - EVP requires a headphone to distinguish message content and not everyone will agree on the message.
Class C - EVP requires headphone, often needs amplification and filtering and will seldom even be heard by others.
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EVP #4
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