Sometimes when I go to bed very tired, I start hearing voices just before dropping off to sleep. It's really weird because they sound like lots of radio stations interfering with each other. Some are in English, others in other languages. This usually occurs when I'm really really tired or after I've been reading or concentrating a lot. I haven't told anybody about this because it doesn't happen very often and when it does, they don't bother or distress me too much, I'm just intrigued about them. Has anybody had similar experiences? Any help and advice would be much appreciated.