The fact that you said that Jesus woke them up three times (in your own words) Hobelim, means there is 3 times the chance that they were awake to hear because Jesus wanted them to hear and people that get woken up three times don't always fall back to sleep right away.
If Jesus wanted them to hear he would not have gone a stones throw away to pray. When he did wake them up he told them they should be praying to be spared the test, not trying to hear what he was saying a stones throw away.
And how did Jesus teach others to pray? Go into the closet and shut the door and pray in secret. That means withdraw within your mind and shut your mouth.
That's a clue for you.
How do you think 1st, 2nd, 3rd year medical students stay awake and do general surgery in the third year after being awake for 24 hours? I looked online to try to find out what it is all about. It seems if the medical profession can get away with sleep and still be credible then the disciples can too.
At night, no one is making noise so you can hear from a stone's throw away. I can hear my employer from across the office talk about things that I'm not supposed to know.