Are these the same as what I call "micro-dreams"? When I'm trying to fall asleep I will get these tiny but full end to end dreams on situations and voices and places - but clearly I am not asleep. I'm in that "trying to fall asleep" phase.

What is this called?

They're things actually happening, they're just very loud. Someone speaking is like wearing headphones turned all the way up, is the best approximation for it. Is that still part of the definition of a hallucination?

Hmmm, I know what you mean. I've experienced both... hard to say if they're the same thing or not though... They're certainly triggered at the same point for me but not always concurrent, as I've had both in isolation as well.