Electronic Voice Phenomena research studies voice-like sounds or speech-like structures that appear on recordings without an identified ordinary source. EVP work does not begin with proof language. It begins with documentation: what was recorded, under what conditions, with what equipment, and what possible sources were present.

A responsible EVP session has a defined start time, clear location notes, known participants, quiet control periods, spoken markers when anyone moves or makes noise, and a review copy that can be compared to the original. The stronger the documentation, the easier it is to separate an interesting candidate from contamination.

Avoid calling a sound a spirit voice because it feels meaningful. Avoid telling listeners what to hear before they review the clip. Avoid over-filtering until the original character of the recording is lost. The honest phrase is often: a voice-like audio candidate was captured and remains under review.