The Cherry Blue's (used in Das Keyboard, etc) are pretty noisy. You can very clearly hear typing on those from at least another room. Depending on the pace of typing it can definitely distract those who are not used to hearing it. The Cherry Brown's lack the distinctive CLICK. But are not really terribly loud. They just sound different than regular (cheaper) keyboards out there. But part of this depends on the typist itself. If you type with a soft touch, the keyboards are really not much louder than any regular keyboards out there. If you really hammer the keys, the keyboard can get pretty loud and obnoxious. If you can get over the noise of the boards, they really are much better keyboards to type on than the POS $3 buck keyboards you get with a PC.