Bridge Seating / food for thought

[Ric Brekne]

Nice article JD

Tho it is really about a different related topic... it does have a 
directly related paragraph.

As far as I can see that paragraph shows exactly what I've been saying. 
The section Discussion of Physical Causes  outlines a general cause of 
false beating along the lines of the wobbly pin model.  BUT then if goes 
on to state that for a 1 meter string at 261 herz a 0.1 mm difference in 
length would result in a false beat of around  1/40 th Hz !  Figure out 
the amount of sideways wobble required to get that 0.1 mm difference in 
length.  And as for the 80 mm long example C88 the article has that same 
difference in length change (0.1 mm)  

The only way the horizontal and vertical string lengths can be as much 
as 0.1 mm different as a result of the pin moving is if the pin is 
moving back and forth. Sideways... it has to move too much.

Otherwise... the article does raise some interesting thoughts about 
bridge admittance. In general the notion of a string with anisotropic 
localized boundary conditions at the bridge can get into several 
issues.  The reading is a bit think for the most part and I'll need a 
few readings to digest it fully. 

Cheers
RicB