James Nelson, Ph.D., Principle Investigator. In this report, several recommendations were made for the testing and demonstration of a number of new or emerging wheel/rail noise-control technologies. Specifically, recommendations were made to test (1) several types of wheel and rail vibration absorbers, (2) nitinol wheel treads, and (3) piezo-ceramic vibration dampers. Based on these recommendations, the objective of this report was to field test wheel and rail vibration absorbers to determine their effectiveness in reducing rolling noise on tangent track as well as wheel squeal on curved track.

Report 67 can be found HERE.