Sports equipment incorporating granular materials for vibration damping

摘要

A piece of sports equipment incorporating a granular material for vibration damping. Vibrations incurred during the use of the equipment for a sporting activity can be reduced or virtually eliminated by the strategic disposal of granular materials for damping that vibration, thereby improving performance and user satisfaction. The use of low density materials for this damping minimizes the negative impact of increased weight on performance, while the use of granular materials with low bulk sound speed ensures effective damping of both high and low frequency vibrations. Also disclosed are methods of improving damping performance by mechanical annealing.