Don Mannino wrote: > But the flutter effect from the sound bouncing off of a spinning fan (which > I think is what you are referring to) would certainly be eliminated, so I > agree it would be interesting. Yes, that's a Doppler shift from echoes off moving blades. >I'd like one to keep me cool on the warm > summer nights! No noise! > > But then again, not at that price. Me either. Ron N
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