Yah, lets trade in our relatively quiet WC systems for a horrendously expensive chainsaw sounding air cooler! The Delta fan from hell!
On a serious note, while this is less insane than liquid nitrogen, it's not very much less. It is easier to do phase change cooling to get this kind of result (do it professionally with a prometia or similar) without the sound, regardless of how loud it seems to any individual. Plus, wouldn't the cost of compressed air build up rather quickly?
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