Per is Chair of Mechanical Engineering at University of Washington, with expertise in dynamics, impact, and vibration analysis. He earned his MS and PhD in Applied Mechanics at Caltech. Per is Director of the Boeing Advanced Research Center at University of Washington and is a UW Presidential Entrepreneurial Faculty Fellow.
Julie is an environmental scientist and project manager, specializing in regulatory compliance, environmental permitting, and the Endangered Species Act. She has worked as a liaison biologist for Washington State Department of Transportation at US Fish and Wildlife Service, completing formal and informal consultations for nearly a decade. She earned a BA from Harvard University and an MS in Marine Affairs from the University of Washington.
Ulf is an expert in large metal fabrication, having served of President of Rotodyne, Inc., a provider of consulting services for paper and pulp manufacturing facilities throughout North America. He has a BS from University of Washington.
Recorded from hydrophone deployed at 10m during subscale testing of 8" steel piles in Seattle, Washington in 2013.
You are hearing 4 strikes of a standard pile followed by 4 strikes of a Reinhall Pile™. Notice the difference.