How do you wake people up in your world? Do alarm clocks and roosters not work? After all, if I'm unconscious, loud noises wake me up, so, I'm capable of hearing, even while unconcious. Note, I cannot take actions or reactions, so, I cannot make skill checks while unconscious. But, hearing something isn't a skill check. There is no Listen skill in 5e. There's Perception, but, that's different, and not applicable here since the PDK wants me to hear him. I'm in range, I can hear him. "Unaware of its surroundings" doesn't mean I'm in a coma state. Not when I can come back from it so easily.