[flogic]

You can make a mechanical keyboards significantly quieter. Most of the noise isn't actually from the switches themselves but rather from the impact of the keys bottoming out into hard plastic. So a set or 2 of o-rings on the keys will really cut down on the noise.

When I get around to constructing my next custom. I'm going to use non-clicky switches with a thick acrylic plate and of course a set of o-rings. In theory, it should be very office acceptable.