Abstract:

Longitude sawn timber usually was used as studying the properties of instrument vibration board. As radial sawn timber was also selected to be vibration board in real production, it is very important to evaluation the properties of the vibration board in the round especially when radial sawn timber sound radiation character and its relationship to longitude sawn timber have been studied. Up till now, for the nation and international experts, radial sawn timber has not been studied on its role and its function in sound radiation. This paper deals with seven important Spruce species that grow up in Sichuan and Heilongjiang Province of China and a Picea sitchensis specimen from America. Under the high mode bending vibration, MOE and other parameters of longitude and radial wood are tested. The results showed that there are some relationships between the vibration properties of longitude and radial wood. This research can be helpful to select the proper anisotropy, good toughness, and weakness in shear of longitude and radiation vibration timber to be musical instrument wood.

Key words: genus Picea wood, longitude direction, radial direction, sound vibration properties