This is how i usually deal with noise...If there is noise in reflection pass, it is most likely from material samples, i almost always start off with 64 minimum in most of my materials.
If there is noise in Vrayrawlighting pass, it is most likely caused by overblown white areas from direct light, or from low number of samples in the light itself. In all my scenes i use .005 as noise treshold, and it has worked for me so far.
Your scene with the bed, it seems like the problem is with overblown areas, since most problematic spots in your scene are white, and curtains are really noisy too, in the areas where light hits it, check if you are not yousing 255,255,255 in your white material, as everyone is already pointing it out everywhere- no material is pure white.
Try rendering small region of noisy area, and go up on light samples, even up to 256 or 512, and/or reducing light intensity..
Hope it helped and you will figure it out.