That kind of sucks. I've definitely had that like when there's some kind of white noise around, where you start hearing what sounds like voices but don't know what their saying. As long as it isn't terribly distressing to you, I wouldn't worry too much about it. If your not worried about it/thinking about it, you probably either won't hear it or it won't annoy you. As long as they don't start telling you weird, messed up stuff that you feel compelled to act on, I wouldn't worry about it too much honestly