The voices sounded human, like hushed. I can't say in my case.

In Christianity, Satan and demons are recognized as a reality. God allows them access to humanity. That doesn't make God evil, and in fact God uses evil forces to drive people to Him. And we are given the choice to go with whatever party we choose, so the whole experiment hinges on choice. I know that the prince of Earth, Satan, isn't sporting; of course he preys on the vulnerable and the weak first. That was one of the low points in life for me when I heard the voices and when I had no faith.