Fig. 3From: Effect of extraction on the acoustic vibrational properties of Picea jezoensis var. microsperma (Lindl.) W.C.Cheng & L.K.FuRelative change in the propagation velocity of bending vibration (Ï…L), acoustic radiation (R) and acoustic impedance (Z) of spruce wood after treatment with deionized water, dichloromethane, benzyl alcohol, and ethanolBack to article page