Hierarchy of
Violin body
Resonances
For a violin made from scratch.
Blue boxes are actual measurements.
All ideal frequencies are for a full size
4/4 Strad. violin body and for 'solo' tone.
All ideal frequencies are at 6%
wood Moisture Content (MC),
actual MC =
%
B1- to B1+ delta
ideal = 85 Hz (solo violin)
with thanks to Patrick Kreit
A1 to B1+ delta
ideal delta = 75 Hz
actual delta =
B1- to A1 delta
ideal = 8 Hz
actual delta =
Violin:
Date:
Complete violin, varnished with chin-rest
A0 (Helmholtz) air resonance
with sound post
ideal = 270 Hz
actual =
B1- body resonance
for dynamics,
ideal = 445 Hz
actual =
A1 (air column) resonance
ideal = 456 Hz
actual =
B1+ body resonance
for power,
ideal = 531 Hz
actual =
B0 body resonance,
ideal = A0 = 270 Hz
actual =
CBR (C2) resonance
ideal = 413 Hz
actual =
fit 6 to 6.5 mm. sound post
X
X
+
coupling frequency delta
ideal = 25 Hz
measured difference =
Hz
typ. + 32Hz
X
X
belly plate glued to garland (bouts)
Coupling frequency of belly
ideal = 264 Hz,
actual =
A0 (Helmhotz) air resonance,
with no sound post
ideal = 240 Hz,
actual =
add ..
back plate glued to garland (bouts)
Coupling frequency of back
ideal = 290 Hz,
actual =
X
belly Mode 5
f-holes cut, bassbar fitted
ideal: weight = 67 gms,
ideal Mode 2 = 170 Hz,
ideal Mode 5 =345 Hz
actual weight =
actual Mode 2 =
actual Mode 5 =
belly Mode 5
*before* f-holes are cut
ideal: weight = 67 gms,
ideal Mode 2 = 170 Hz,
ideal Mode 5 =345 Hz
actual weight =
actual Mode 2 =
actual Mode 5 =
garland
or bouts assembly
ideal weight = 55 gms
actual weight =
X
back Mode 5
ideal: weight = 96 gms,
ideal Mode 2 = 170 Hz,
ideal Mode 5 =345 Hz
actual weight =
actual Mode 2 =
actual Mode 5 =
Jonathan Rowe, 11 May 2012
bridge, strings,
end pin
Components
neck
ideal weight (no pegs) = 67 gms,
ideal freq. = 480 Hz,
actual weight =
actual freq. =
pegs
weight =
(C) copyright Platetuning.org
tailpiece
actual weight =
chinrest
actual wt. =
fingerboard
ideal = 67 gms,
ideal freq. = 430 Hz
actual weight =
actual freq. =
Violin parts freq's hierarchy V1.2.Dpp
with thanks to Patrick Kreit