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Table 2

Mechanical properties of the materials used for the study. ρ is the mass density, Ex and Ey are the Young modulus in the x and y direction, respectively. G denotes the shear modulus, ν is the Poisson coefficient, and η is the modal loss factor.

Material ρ (kg m−3) Ex (GPa) Ey (GPa) Gxy (GPa) Gxz (GPa) Gyz (GPa) ν xy η (%)
Sitka spruce 380 11 0.650 0.66 1.2 0.042 0.26 2
Beech 750 13.7 2.24 1.61 1.06 0.46 0.3 2

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