Calling Mira new is a bit of a stretch (delivered in 2012?). The BlueGene/Q systems, of which Mira is, are freakishly quiet. I work in a place that used to have POWER systems with a similar cooling setup and it was the quietest machine room I have ever stepped foot in.
I did! 15 years ago I went and had custom earplugs made with replaceable attenuators, and they're still in perfect shape. Without question, it was the best $200 I've ever spent. I can't recommend them highly enough to anyone else.
