Impact-Echo Signature Analysis (IESA) - A New Evaluation Procedure for Impact- Echo Data based on Spectrograms

A cam buckle system has a lever arm which is pivotally connected to a base plate. The lever arm rotates a lock arm with cam teeth into abutment with a strap to lock the strap against movement. The strap also extends through a capture slot on the lever arm so that manual movement of the strap will open or lock the cam buckle as well as tension the strap. The cam buckle can be used for any tension member, but has particular utility to interconnect a pair of wrist straps of a ski pole grip. The straps and cam buckle form an adjustable length loop which can be tightened to form a heel support for the ski grip. A single point attachment at a top of the handle includes a vertical slot and spreader plate to vertically orient and open the pair of straps. This creates a wrist strap adjustment system that can be quickly manipulated using a single gloved hand.