I want to box in a noisy shop vac (from Ridgid) to minimize its noise

I've seen muffler-like attachments that connect to the exhaust. I'm
not sure that a box surrounding the vac would be effective. The first
thought would be that it would limit it's mobility.

Recently, I've started wearing ear muff protection when I use my
whining Milwaukee vac. As I get older, I have to save as much of my
hearing as I can.