[pianotech] #2 Soundboard Wood

[Delwin D Fandrich]

As I said, it matters if the soundboard assembly design depends on the internal
compression of the wood panel to develop crown. In this case it is best to have
a reasonably narrow and consistent band of earlywood.
 
It also matters insofar as the uneven grain characteristic affects the mass and,
to a lesser extent, the stiffness of each individual piece of wood that makes up
the soundboard panel. At least in theory. In the board sizes typical to the
average soundboard panel both of these characteristics vary less than you might
think and, in the real-world soundboard assembly, are of little or no
consequence. In a rib crowned soundboard system these variations can easily be
accommodated by the proper design of the ribs.
 
ddf
 
 


  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of
erwinspiano at aol.com
Sent: March 11, 2009 7:05 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] #2 Soundboard Wood


Hi Del
  I actually agree with much of what you've proposed when it comes to the
perfect wood expectation but before I get into an deeper opinion (pit of
quicksand) I'd like to know if you are saying that grain density or lack of
density,grain orientation, color, run out,knots, bear claw/ surprise have
nothing to do with tone production in the piano as we know it? The reason I ask
is that the tone of your post says that none of that matters and hey maybe it
doesn't but If the answer is none of it matters, then I think from my own
imperial, but biased work...I would say to some degree it does matter. 
  We all agree many things are at work symbiotically producing tone. Surely the
density of the woods we use have an impact on the impedance quotient of any
system & there by the tonal envelope  (color sustain clarity...fill in the
blanks)
  Dale

 

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