I would put sounds much more in a category of threat assessment for the brain than objects. Waking up when there is a big sound (lightning, heavy machinery etc.

I would put sounds much more in a category of threat assessment for the brain than objects. Waking up when there is a big sound (lightning, heavy machinery etc.) can really interrupt one, especially if you haven’t had your full REM cycle. I do think objects can be affective, but one would never willingly put scary stuff near your bed, unless you’re into that sort of thing. Now your phone can be threatening if you always expect the worst, e.g. your employer constantly prodding you with messages , but then you have bigger problems.