[pianotech] re.:Bladeless fan

[Don Mannino]

Well, I'll take "Doppler shift of echoes" but not "from echoes."  But you're
right, it's nit-picking.

:-)

DM

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ron Nossaman
Sent: Sunday, June 20, 2010 10:44 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] re.:Bladeless fan

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