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Cleaning up and analyzing modes

posted 22 Mar 2015, 08:37 by Peter Grankulla   [ updated 22 Mar 2015, 08:38 ]
One reason why I wanted to fix this top is that it was great when i made it (2010) and it's even better now. It has been heat treated and is very stable. Now that I scraped off the old wood grounding it rings longer too. As for the frequencies I also got to check what I already kind of knew; M5 did not change with the stripes, neither did M5 change when I evenly trimmed them, weight/stiffness ratio stays the same when placed in the middle like this. This is the key to tuning/optimizing bass bar and violin plates in general.

No re-tuning needed, I'm going to leave the thicknesses as they are.

M5 = 353 Hz, 5% MC
M2 = 158 Hz

Thicknesses
A 2,7  -3,0 mm
B 1,8 - 2,1 mm
D 1,9 - 2,2 mm
C 3,3 mm
Edges 2,3 - 2,5 mm



 


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