Word for "invisible god-like voice"

Solution 1:

Wikipedia lists akashvani as an English word.

Akashvani / Akashwani, आकाशवाणी (ākāśavāni), means "celestial announcement from sky" or "sky-voice": a word of Sanskrit origin,1 Often in Hindu mythological stories, folk-tales and fables like Panchatantra & Hitopadesh, whenever, Gods wanted to say something an Akashvani occurred. Literally Akash means sky and Vani mean sound/message. i.e. sounds or message coming from the sky.2

Encyclo has an entry that points to the above definition.

Solution 2:

A "disembodied" voice would be one that comes from no apparent person or source.

This phenomena is also used to describe "ghostly" encounters as described in this blog from Micah Hanks on MysteriousUniverse.org excerpt:

"On occasion, strange phenomenon such as this does tend to occur, particularly as one awakes from a sleep state, where disembodied voices can be heard so lucidly as to create the certain impression in one’s mind that they are not alone. And yet, on further inspection, more often than not there actually is no one else with you… thus, could such voices merely be products of the imagination? Or might there be something more to such odd utterances from beyond?"

Solution 3:

Divine - of, from, or like God or a god.

Usage: "Moses had a divine revelation."

OR

"That red light saved us from a car accident, it was like divine intervention."