Correlation of tire intensity levels and pass by sound pressure levels

摘要

The object of the work reported here was to relate the acoustic intensity level measured near the contact patch of a driven tire on a passenger vehicle with the pass by noise levels measured at a sideline microphone during coast and cruise conditions. Based on those measurements it was then possible to estimate the tire noise contribution to the pass by level measured when the vehicle under test was accelerating. As part of this testing program, data was collected using five vehicles at fourteen pass by sites in the United States: in excess of 800 data sets were obtained.