On February 2, 2015, a symposium and panel discussion was held to discuss a new double wall pile designed to improve noise attenuation, focusing on results from recent full scale testing in Puget Sound. This innovation was developed and tested with support from WSDOT, the Federal Highway Administration, the Port of Tacoma, and several leading engineering and environmental consulting firms.
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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.