A weighted compression vest also works well and is great for the daytime/school. My son has to wear it daily and he calms down immediately. My son often says noises that most of us don't hear "freak him out". Very common with SPD. There are parts of the brain where the neurons normally get pruned that deal with auditory processing that for whatever reason don't get pruned (in our case my son was born at 27 weeks) so we know where his came from. I pray some day they have some kind of hearing aid that maybe filters out these background noises for them as it must be overwhelming to hear a lot of "extra" sounds constantly.