See, I see in Scripture that man cannot hear God in his sinful nature - we must have a nature change in order to be able to respond to Him. When we have that nature change, we WANT to respond to Him in a way that we never thought we would before.
Did Adam hear God calling after he had sinned and was dead in sins?
Gen 3:9 And the LORD God called unto Adam, and said unto him, Where art thou?
10 And he said, I heard thy voice in the garden, and I was afraid, because I was naked; and I hid myself.
See, when you say that unregenerate dead men cannot hear God, you are also limiting God's power. You are saying that God does not have the power to speak to the dead.
I say God DOES have the power to speak to the dead, and that is exactly what the scriptures show.