a preliminary study into acoustic properties of acer velutinum wood

the course of consecutive experiments in this report aimed to a research or introductory identification about mechanical and acoustical properties of maple (acer velutinum) wood. studied factors were included quality factor (due to internal friction), acoustic coefficient, acoustical conversion efficiency as well as the modulus of elasticity (young’s modulus) which they were all accomplished using contactless magnetic forced vibration of both ends free bar non-destructive method. the research specimens were extracted by solvent washings to reduce their extractive contents. then their related vibrational properties were evaluated consecutively before and after each steps of successive extraction. comparing to the previous literatures, results here showed that wood from maple is potentially utilizable in backs and ribs of violin, tar and wood-wind instruments. reducing the extractive contents didn't affect the moduli of elasticity but was positive for the quality factor, acoustic coefficient and acoustical converting efficiency to improve their future acoustical performance i.e. musical instrument industry.