Perhaps it’s somewhat ludicrous to offer to let people hear what something “silent” sounds like, but here we are. Of course, Cherry’s MX Silent Red and Black switches aren't literally silent, but they are pretty quiet.
We had a chance to chat with Cherry representatives at CES 2017, and they explained how the bumper system works on the Cherry MX Silent switches to reduce noise at two points on the full switch travel.
After an exclusivity deal with Corsair expired, other keyboard makers are free to bring the Silent switches to their own devices. Cherry has one of its own--a version of its G80-3000 keyboard. Yes, it looks like something out of the1980s, but it comes bearing brand new switches.
You can hear a comparison between Cherry MX Red and Cherry MX Silent Red in the video, as well as one (in a more quiet setting than the CES show floor) showing the audible difference between MX Silent Black switches and standard MX Red switches.
Technically, this is an apples to oranges comparison, but in this case it’s apt. Red and Black are both linear switches and have essentially identical specs, save for the force required to actuate them. Therefore, they make roughly the same sound.
But you can judge for yourself when you check out the video.