Influence of the main components content of Picea jezoensis on acoustic vibration properties
The main chemical composition content of Picea jezoensis (holocellulose, lignin, and extractive content) was measured using the traditional chemical experiment method, and the vibrational parameters including of dynamic elastic modulus E, specific dynamic elastic modulus E/ρ, acoustic impedance Z(ω) and sound radiation coefficient R, of the spruce samples were measured using the multi-channel fast Fourier transform analyzer. The relationship between the different components and wood acoustic vibration properties were analyzed by simple linear regression analysis and bivariate regression models. The results showed that the holocellulose content significantly affected on the acoustic properties of the wood. The vibrational properties first increase and then decrease with the increase in holocellulose content. The best vibration properties is achieved when the holocellulose content is 62% to 65%. Lower lignin content and benzyl alcohol extractive content are beneficial in improving the acoustic properties of wood.