^^ You didn't read the class, did you?
Had you done so, you would have seen that the "noise," -- vibrations, etc -- is not a stage, but a distraction, and you should do what you can to ignore them. But that aside...
Hypnagogic Imagery (HI) and "noise" really shouldn't be present in any meaningful way during DEILD; I have a feeling that that girl's laughter might have been your next dream forming, and, had you stuck with the DEILD, you likely would have been in the dream you were expecting, perhaps with hot girls and pornstars included!
Try not to look for popular DV forum distractions like vibrations and hallucinations; they are
not a stage, might never come and, if they do, might serve only to distract. And if you're doing DEILD, consider a woman's voice a bit of dream, and follow it fearlessly into that dream rather than waking.
Again, I suggest you look at my
course. You seem to be "right there" with this stuff, so its content might be helpful.