Rensselaer Polytechnic Institute

Peter A Giacobbe

Henry August Scarton

Yau-Shing Lee

A method and apparatus for determining the degree of dynamic hardness of a material, such as a sporting equipment item. The method includes the steps of impulsively exciting a surface of the material by impacting the surface against a second, relatively hard surface in contact with a force-measuring device, and then measuring a signal from the force-measuring device to determine a frequency-dependent spectrum of the force exerted by the excited surface on the second surface. From this data, a roll-off frequency is measured and then analyzed to determine the degree of dynamic hardness of the material.

Growing community of inventors

Troy, NY, United States of America

Peter A Giacobbe