Presume they heard the crying then around the time of the shouts for help. This would support the defences case.
They're saying crying, but very loud crying, and the Help, help, help, but I don' think it does support the defences case, because they say they should have heard help, help, help and then the bat.
So I can see why a loud noise wouldn't actually wake someone properly, and that only subsequent (possibly quieter) noises would.
I agree with this as a possibility but again, they're not waking until after all the bangs are done. Or at least, they're not hearing any of the bangs, despite the 'Help, help, help' coming in the middle of them.
Basically, they seem to be waking at the wrong time - so I agree that it took them a while to surface properly, and that it's the ongoing nature of the noise rather than the volume that disturbs them, IF they weren't able to hear the 'Help, help, help'. If they heard that, the defence says that the bat was as loud as the gunshot, so they must surely have heard that.