Abstract
A 1‐yr in‐service evaluation of damped subway wheels is being done on the New York City Transit Authority system as part of the Urban Mass Transportation Administration's Urban Rail Noise Abatement Program. Four types of damped wheels are being evaluated to determine their effectiveness in reducing wheel squeal. Acoustic data are being collected throughout the 1‐yr program to monitor the acoustical performance of the wheels. Data are also being collected to determine the cost of the wheels, including any additional maintenance and inspection. This presentation focuses on results obtained through the first 6 months of the 1‐yr evaluation. [Work supported by the United States Department of Transportation.]
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