TRB’s National Cooperative Highway Research Program (NCHRP) Report 630: Measuring Tire-Pavement Noise at the Source examines a suggested procedure for measuring tire-pavement noise at the source using the on-board sound intensity (OBSI) method.
The following appendixes to the report are available online. Appendix A: Review of Literature Appendix B: Test Evaluation of Candidate Methods and Recommendation for Test Procedure Development Appendix C: Results of Test Parameter Evaluation Appendix D: Demonstration Testing of OBSI Procedure