Comment by frou_dh

Something I've learned from discussing computer hardware informally online over the years is that people have vastly different standards for what it means for fans to be "silent" in use. So much so that it's hardly worth discussing, because someone will insist that such and such fan or actively-cooled device is silent, and then you buy it and it sounds like crap. I suspect it's "Cloth Ears" in many cases.