They do that at work! Dash 60 (gas turbine generator, you've got an idea of how loud that would be) is running, and it's using the bleed air (noisy) to drive an air conditioning unit (also predictably loud), and instead of just giving up on hearing their "music"*, they'll turn that all the way up. Making it even louder doesn't help, you still can barely hear it (good thing) but it's even noisier still.

*"Music" being some sort of death metal grind core something with the singer screaming incoherent lyrics, or maybe just is gargling gravel. Awful, no talent crap. Coming from a guy who likes Def Leppard, Hammerfall, Iron Maiden, Megadeth, and Nightwish...