The power of the shofar to reach Hashem is the given of the mitzva, but its power to change me is the cause to which the Satan has no response. The Shofar as a part of prayer is the norm, but when we add a blowing to prepare ourselves for our rendezvous with Hashem, something very powerful is created. Id like to share a thought from Rav Zadok HaCohen MLublin. Rav Zadok alludes to the famous idea that the ram sacrificed by Avraham Avinu at the Akeida had two unequal horns. The smaller horn was blown at Har Sinai, and the larger will be used to usher in the moshiach and the final redemption.
Redemption is the message of the shofar permeating completely.
The complete redemption comes when the universe is filled with the sound, and personal redemption when I am immersed in it. Now we can go back to the Rambam. Superficial sleep is what confronts the observer. Either a person is awake and active or asleep and immobile. All we know is that right now he's not interacting with the world.