The vibrational properties of native and thermally modified wood in dependence on its moisture content

Abstract The vibrational properties of spruce ( Picea abies Karst.) and European beech Fagus sylvatica L.) were investigated in this study dependence on the relative humidity (RH). RH was measured at 20 °C ranging from oven-dried to 85%. For evaluation dynamic modulus elasticity E’ damping coefficient tan δ 7 climate steps. same samples used for tests afterwards mildly thermally modified 180 Both wood species compared evaluated considering property changes (E’, δ, sorption isotherms volume swelling) due thermal modification. chosen modification resulted a marginal change spruce, whereas clearly changed. could be improved usual range (35–85%) it concluded that mild modification, conducted study, is not suitable improving properties. Further conclusions concerning underlying causes as well use musical instruments drawn.