System-wide OBSI study to evaluate success of diamond grinding to attain project noise reduction goal

08.26.2013 | J. Eric Cox |

HMMH’s Chris Menge and Eric Cox conducted an On-Board Sound Intensity (OBSI) tire/pavement noise measurement study for approximately 9 miles of I-195 in Providence, RI. This study sought to measure the effectiveness of the Concrete Wearing Surface Modifications (Diamond Grinding) Project to reduce tire/pavement noise, and the project-specific value of this practice. The paper includes detailed data sets of the existing and post-grinding dB(A) measurements for several highway structures including the Providence River and Washington bridges.

This project required measurement, analysis, and presentation of continuous OBSI time histories for the entire study area, consisting of eight travel lanes and eight ramps for a total of approximately 15 kilometers (9 miles). Near real-time results are provided with data on the success rate and overall noise reduction accomplished due to the Concrete Wearing Surface Modification Project.

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About the Author
J. Eric Cox, Senior aviation consultant, HMMH

J. Eric Cox

Senior Consultant

Eric has worked on numerous noise and vibration project experience across a wide array of market areas. He provides both leadership and support in in areas such as aviation, rail/transit, highway, wind energy, construction/architecture (quarries, construction sites and firing ranges), residential/institutional sound insulation and federal research programs. Eric has also developed expertise with a variety of noise and vibration instrumentation and measurement techniques, such as On Board Sound Intensity (OBSI) and wayside measurements of quiet pavements as well as wind turbine compliance monitoring and rail/transit vibration mitigation studies.

He has most recently been involved in several projects and research efforts to assist FAA and airports in standardizing the process to determine eligibility for AIP-funded sound insulation programs. Eric also has previous experience and ongoing involvement in the development of auralization tools for environmental noise assessments.

Eric holds a B.A. in Mathematics summa cum laude, from Berea College in Kentucky. He has also pursued graduate courses toward an M.S. in Applied Physics from Northern Illinois University.

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