The author considers research into allegedly supernatural "Electronic Voice Phenomena" (EVP) in light of both anecdotal reports and formal experimental studies of related aspects of human auditory perception. He offers the primary hypothesis that an understanding of the relevant aspects of psychoacoustics provides a complete explanation for most EVP recordings, and a secondary hypothesis that an informed understanding of these processes is as relevant to the emergent field of sound art as studies of optical illusions have been to the study of visual art.