For this on steroids (in a good way), see https://mynoise.net/
Every aspect of the sound can be changed with sliders. Increase the background babble, decrease the silverware, etc. I really do believe that a little hubub of background conversation that I can't make out helps me tune out the rest of the world.
I love OP's for it's silliness, though. Not sure I actually want hospital sounds or zombie invasion while I work, but it's good to know I have that option.