My question to you all is...

Is it possible to move air acoustically. ie to move air over a 2.1m distance to be felt by the human body with a cooling effect but not heard by the human ear ?

I'm just thinking about us people that just overheat with applications that I have in mind.

  • 1
    $\begingroup$ Sure. Just use a large diameter, low speed fan that doesn't create any audible turbulence. But I don't really understand what you mean by "moving are acoustically but so you can't hear it" - the words seem to be self-contradictory. $\endgroup$ – alephzero Jun 28 '19 at 15:58

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