The speed of sound depends on the medium that the waves pass through, and is a fundamental property of the material. The first significant effort towards the measure of the speed of sound was made by Newton.
When the Occupational Safety and Health Act passed in 1970, steel-toe boots became a standard in the American workplace, preventing thousands of on-the-job injuries. Today's technology has only increased the variety of work boots available, and it's important to understand the differences before purchasing a pair.
The basic philosophy behind our toe links as with all of our products is to design and manufacture the components to the highest specification possible by utilising only the highest grades of aluminium alloys, specifically 7068, 7075, 6061-T6 mandrel drawn thick wall tubing (this is custom made for us by Alcoa) and A4-80 and 316 stainless steels.