Temperature Effect on Coast-by Tire Noise

Tire noise decreases when temperature increases and the influence depend on tire-road combination. In order to quantitatively analyse the influence of the temperature on the transmission loss and the mechanism of tire occurrence, and to determine the influence of temperature on the noise source of different tread pattern tire, this paper studies the variation of coast-by noise level of a passenger car with five different tread patterns at 80 km/h with temperature is investigated, on ISO 10844:1994 test track surface, under different temperature conditions. The analysis of the results shows that increasing pavement temperature leads to a 0.45-0.885 dB(A)/°C reduction in the coast-by noise levels and a 0.029 dB(A)/°C reduction in the coast-by transmission loss.