Wapin Revisted

[Cy Shuster]

You can see some of Dr. Birkett's high-speed videos here (note you may need a special plugin for it to work):
http://real.uwaterloo.ca/~sbirkett/high%20speed%20imaging.htm

--Cy--
  ----- Original Message ----- 
  From: Ric Brekne 
  To: pianotech at ptg.org 
  Sent: Monday, August 14, 2006 3:11 PM
  Subject: Wapin Revisted


   If you have a gander at the following page :     http://www.kettering.edu/~drussell/Demos/reflect/reflect.html , neither the absolute soft or hard examples seem to fit... rather something inbetween seems to happen.  Of course one would have to examine the high speed photography much closer to be sure.. but it appeared convincingly enough to me that the reflected pulse highest amplitude did not go below the origional string line until the pulse had traveled quite a ways back across the string. 
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