Different ways of elastic modulus comparative study to predict resonant properties of standing spruce wood
Resonant method of determining modulus of elasticity and shift and decrement of fluctuations’ operates in Russia to determine elastic-viscous properties of wood (GOST 16483.31-197474). The method is destroying and demanding much time and expenses for manufacturing pre-production models in the form of rectangular bar sized 20×20×300 mm, which requires tree cutting down, severing, sawing, etc.; as a consequence, it has not found wide implementation in the practice of research and, especially, selection of qualitative material for musical instruments manufacturing. The work objective is to conduct basic research on revealing a more effective and precise non-destructive method for identifying Young’s dynamic modulus of elasticity as a basic criterion of standing spruce-tree resonant wood quality with the aim of its selection at an early age and creation of perspective object for woodworking with reference to musical instruments manufacture.