The same pattern-seeking ability which helps us make sense of distorted speech can cause us to hear words where none exist. Richard Dawkins writes:
Once, as a child, I heard a ghost: a male voice murmuring, as if in recitation or prayer. I could almost, but not quite, make out the words, which seemed to have a serious, solemn timbre. I had been told stories of priest holes in ancient houses, and I was a little frightened. But I got out of bed and crept up on the source of the sound. As I got closer, it grew louder, and then suddenly it “flipped” inside my head. I was now close enough to discern what it really was. The wind, gusting through the keyhole, was creating sounds which the simulation software in my brain had used to construct a model of male speech, solemnly intoned.
Had I been a more impressionable child, it is possible that I would have “heard” not just unintelligible speech but particular words and even sentences. And had I been both impressionable and religiously brought-up, I wonder what words the wind might have spoken.