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US 6,610,915 B2Granted
Soundboard of composite fibre material construction
OwnerMartin Schleskeinventor
Life of this patent
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OwnerMartin Schleskeinventor
Estimating the term…
A soundboard for use in acoustic musical instruments such as bowed stringed instruments in which the sound radiation takes place by means of resonant bodies. The soundboard has a body constructed as a composite fibre sandwich plate having a favourable ratio of stiffness to mass relative to conventional soundboards made from solid wood or composite which produces an increase in the sound radiation of the musical instrument. The area defined by the soundboard is enlarged relative to the average area of the soundboards of conventional musical instruments of the same type in such a way as to compensate for the characteristic frequency shifts and thus changes in timbre which result from the more favourable ratio of stiffness to mass of the composite fibre sandwich plate relative to the conventional solid wood soundboard.
A soundboard for an acoustic musical instument, said soundboard comprising a composite body composed of elongate fibers in a carrier, at least one zone of said body having a quality quotient (QM=cL/rho) of at least 0.02 m4/sg where cL is the velocity of sound (in m/s) of waves longitudinally of said zone and rho is the average total density of said zone.
Dependencies are inferred from the claim text.