for me the voices started due to a harrassment routine back from 2009-2011. The voices kept repeating a**hole through vents, fans, water running. then they said they were fbi, kept using a tone on me in the hospital, telling me to lay down, hold my breath for 5 minutes, saying they will stop if i comply. then over the course of months. i experienced paranormal strangeness and the voices went from fbi to the dead and hearing evil lies loud as airplanes. I would get jerked out of sleep by invisible forces. kept awake for days, being chased by more lies. Its scary, i would rather had not ever heard voices, or known this level of harrassment and pain.