I pick number 3 too
What does being a heavy sleeper have to do with being HoH?
I sleep on the planes all the time; I always wake up when it land. Kinda hard to sleep through the vibrations of the engines slowing down and the massive thud.
My friend on the other hand, not deaf or HoH, somehow sleep through all that including the announcements and require to be tapped on the shoulder to wake up.