I get this too! I have to be really tired, lying down and calm. I always think of it as listening to the noise of my subconscious. Mine isn't continuous, more I

I get this too! I have to be really tired, lying down and calm. I always think of it as listening to the noise of my subconscious. Mine isn't continuous, more I can pick up nonsensical phrases every 10-20 seconds. I've never heard of anyone else having this!