Samenvatting
Bias ply truck tire resonant vibration and sound fields were evaluated in the laboratory by standard vibration and sound measurement procedures. Four resonances were isolated between 90 and 250 Hz. Analysis of the sound and vibration fields showed that each isolated resonant mode radiates acoustic energy like a simple source. The modes investigated were determined to be acoustically slow with the attendant acoustic radiation emanating from a region within 1/4 wave-length of the tire foot-print.