Soundboard Evaluation

[Richard Brekne]

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Thanks Ron and Del for your answers.

There are a couple stickers for me personally that I wish you could clarify
closer if you would. Let me try to explain by way of example...

On the one hand you have the following statement....


     There is far to much internal fiber damage, it will never again
     support the kind of internal compression needed to form the stress
     interface between the panel and the ribs to support crown."

Fair enough... no problem with anything here..... then you have this..


     "If there is still enough structural integrity
     left in the original panel to hold itself together I see no reason why
     this
     won't work. And work just about as well as a panel made out of new
     wood. The
     age of the wood is purely incidental. The only thing of any real
     consequence
     would be the fiber compression that has taken place over the years."

Then I begin wondering where we are going with this point about the
"consequences of fiber compression".... Follow me for a bit and you may see my
problem.... Given three rib crowned panels, one of new wood, and one of old
compression damaged wood, and an old panel that was rib crowned origionally. If
fiber compression damage is of consequence with respect to acoustic performance
then the board that was made from compression damaged wood should clearly be
inferior sounding.... right ?... and if then all three sound very much the
same...then doesnt it follow that this fiber compression damage is then, in
itself, of no real consequence at all in this perspective. ? Do you see my
quandry with this ?

Ok to take things a step further then... if it turns out that fiber compression
damage then is of little or no consequence to acoustic performance of said
panel... then isnt this a rather large point removed in the argumentation
against compression crowning to begin with ? (we arent into the structural
integrity / strength of the panel assembly question just yet ok ?... ..cuz I
will conceed that point no problem anyways..I first want to get at how this
fiber damage eventually affect the performance capabilities of the wood isolated
from all other factors.)

Ok... so then we would have to confront the strength of these panels over
time..and if you dont mind... can we take this one step at a time... dealing
with the above first and as isolated as possible... and get into the structual
strength issue in the next episode ?



Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:rbrekne@broadpark.no


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