A major part of EVP research requires you to be able to analyze audio recorded during investigations. Knowledge of frequencies and waveforms will help you determine if a captured sound is a genuine EVP or just unwanted noise in your recording. The main terms you'll need to understand are frequency, amplitude, wavelength, and pitch. Knowledge of these key terms is vital when examining a waveform.

13The best way to analyze an EVP is by using audio editing software such as Adobe Audition or Audacity. These applications allow you to view the waveform that represents that sound, zoom into it in order to pick out specific noises in the recordings, and amplify or enhance them. When looking at a waveform as a whole recording, it's hard to pick out anything useful, as the image above shows. However, it is clear to see areas of loud noise and silence.

Sound waves in a recording...