On a Bone Vibration

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At our previous study, we designed a device to add a mechanical impulse to clarify some dynamic mechanical properties of bones and demonstrated that a bone vibration in natural frequency with high and low-frequency components and with logarithmic decrement was developed.This report demonstrates that logarithmic decrement and natural frequency is constant every site of a femur, but its stress in a bone exerted by one mechanical impulse is varied every site.And differences of the logarithmic decrement between ages and between males and females is not clearly.We make sure them, using Desk-Top Analog Computor.Furthermore, we illustrate the distribution of stresses in one femur in the medial side in detail and in three femurs in both sides.