I first learned how to make EVP's about four years ago when my boss at work explained how too. This was then followed by a period of about two to three years where I believed what he had showed me was silly and he was just hearing some fan in the background that he interpreted any way he wanted to. They are so simple to make. You just plug a headphone or microphone into your computer, use a free download of audacity to record, and find a very quiet room. Record yourself asking a question like "what street am I on?", put the mic down and record about fifteen seconds of dead silence. In Audacity there is an amplify command under the effects menu. Use that and amplify the silence in the recording as max as possible. When you listen back through headphones you can hear the white noise create a sort of rambling, you don't listen for that. Instead you will look for a voice that answers your question in a word or too that stands out from the rest of the noise in the recording. The voice is very faint, however distinct. I didn't believe this would work at first but after listening to the name of the street I was on clearly pronounced over and over about 100 times my mind changed and I became a believer in Edison's phenomena.