Relationship between tyre cavity noise and road surface characteristics on low-noise pavements

In this work, a protocol to study Tyre Cavity Noise (TCN) was developed. Using this new method, TCN was measured on 24 different road pavements, together tyre noise emission measured with the Close-Proximity (CPX) method and road texture measurements. The results were used to model the relationship between TCN and road surface parameters. The analysis shows that the Standard Reference Test Tyre's (SRTT) TCN is correlated to megatexture at low frequencies and that the correlation between TCN and outside noise emission is significant for frequencies lower than 1 kHz. The use of sensors placed inside the tyre for monitoring the acoustic performance of road pavements presents several advantages compared to the CPX method, such as a more compact design, lower cost and lower hazards both for the instrumentation and for other vehicles.

Automated summary

A protocol for studying Tyre Cavity Noise (TCN) was developed in this work, with measurements conducted on 24 different road pavements. The analysis showed correlations between TCN and road surface parameters, megatexture at low frequencies, and outside noise emission below 1 kHz. Using sensors inside the tyre for monitoring acoustic performance of road pavements offers advantages over the traditional CPX method.