Effect of Air Temperature and Vehicle Speed on Tire/Pavement Noise Measured with On-Board Sound Intensity Methodology

摘要

The objective of this paper is to show the variability of tire/pavement noise measured with the On-BoardSound Intensity (OBSI) method under different environmental conditions and vehicle speeds.Temperatures ranging from 40 to 90°F and speeds in the range in which tire/pavement noisebecomes predominant for the overall vehicle noise were tested. The selected speeds were: 35, 45, and 60mph. The paper presents a brief literature review identifying the gaps of knowledge about the effects ofdifferent variables (e.g., environment, vehicle speed) on tire/pavement noise. It presents a summary ofdifferent technologies used to determine noise measurements and introduces the OBSI methodology, itsstandards, and provides an overview of the system and software used for data acquisition.A series of seasonal field tests were conducted on a primary road in Virginia over several months.The results were analyzed to quantify the variation of tire/pavement noise with respect to the testtemperature and speed. Findings confirm the previously observed trend that tire/pavement noise slightlydecreases as air temperature increases. The model shows a gradient of approximately -0.05 dBA/°F.Regarding the influence of vehicle speed, the results showed that for the surface studied tire/pavementnoise increases an average of 2.5 dBA for every 10 mph of increased speed.