ACOUSTICS FOR VIOLIN AND GUITAR MAKERS

We have previously seen how properties like stiffness, mass and internal friction determines the
vibration properties of a plate. We shall try to sort out how one should design a violin top to give it
wanted acoustical (vibration) properties. The properties we shall design a top plate to have are 1)
specific nodal line patterns and 2) specific resonant frequencies. In order to give a better understanding
for the problems related to top and back plates and possible solutions we shall again summarise some
vibration basics concerning the properties of resonances of bars and plates. Thereafter follows
measurement methods of the resonance properties (resonant frequency, level, bandwidth and nodal line
pattern), their use for deduction of mechanical vibration properties of wood (moduli of elasticity and
internal friction) and some data of different wood species.Download PDF now.