Signal to noise ratio is a major consideration when analizing audio. Are you really hearing a voice or is it actually the lower frequencies of another sound that resembles a voice? One simple way to see how SNR affects audio is to play around with it in the software you are using for analysis and examine how the voice chganges as the signal to noise ratio is tweaked.
Below i have included five audio samples that contain the phrase "Can you hear the EVP?" They start out simple, with a decent signal strength but they get progressively harder to make out as the signal becomes weaker and embedded deeper into the noise floor. Can you find the phrase spoken in each file?
I'll follow up on this post in a week or so. Feel free to post your comments and findings. Test your might!
Cody Polston is an author, historian and ghost investigator. He is the author of multiple books on history and paranormal topics. He was the host and producer of the popular podcast Ecto Radio and a writer for Ghosthunter X magazine. He is one of the founders of the Southwest Ghost Hunter's Association and has been investigating paranormal claims since 1985.
In the 1990's several other ghost hunting groups gave him the moniker the "Hitman" due to his involvement in "debunking" several well known haunted locations in Texas. Although the nickname was intended to be a negative insult, Cody adopted the nickname and began using in on his podcasts and other media venues.