---------- > From: Bill Ballard <yardbird@sover.net> > To: pianotech@byu.edu > Subject: Re: Ceiling Fans major snip > Yes, Ira knew. Sound transmitted by or received from moving objects > produces a Doppler effect in which frequency or phase is modualted. For > all practical purposes, I the listener was stationary, as was the plane > in which the turning fan blades moved. However the blades themselves were > attatched to the hub with a slight pitch so as to push air. Hey Guess what....I suprisingly knew this!! My other personality works for two different organ tuners. Some instruments use large single blade fans (rotating side over side) as a tremolo in side a swell box. I believe Austins are this way. (Other tremolos are in the wind supply). Moral of the story.....JUST TELL THEM ITS VIBRATO!! Steven Moore Greenville SC USA
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