Re: Need Doppler Demo (fwd)

["Paul Camp" <pjcamp@coastal.edu>]

How about fastening the whole thing to a wood slat with a hole 
drilled in the other end. Put a nail loosely through the hole into a 
wooden dowel so you can whip it around as a rigid system. Since the 
buzzer always points in the same direction (up), wouldn't this 
minimize the volume problems?


> 2. If you tie it to the end of a long string and swing it around 
> your head you can minamize the rotational wobble but there is a 
> significant variation in volume that we all know accompanies dopler 
> shift.  After some indepth discussions with students in subsiquent master 
> confrences the majority of my students identified the volume change 
> rather than the change in pitch as the primary dopler effect. 
>
> I would be very intrested in any thing that works better.  I was 
> fortunate that my school was on a 8 lane loop (IH635) around Dallas and 
> we could go out and listen to the cars.
>
> On 13 Aug 1996, Brad Shue wrote:
>
> > Buy a piezo buzzer from the shack, hook it up to a battery using 3 or 4
> > feet of wire.  Use the wire as a tether and swing it around over your head
> > with the buzzer running.
> >
> > -=============================================================================
> > James Bradford Shue                             
>
> -====================== (214) 882-7388 ================================
> Joel C. Palmer                         

Paul J. Camp                   "The Beauty of the Universe
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