Advanced Close-Proximity (CPX) method for tyre/pavement noise measurement

The Close-Proximity (CPX) Method is a standard methodology for the tyre/road noise measurement and an anechoic enclosure is widely applied. In the present project, numerical simulations are used for the design and development of the PolyU Mark III CPX trailer enclosure, in order to ensure the advancement of the CPX methodology with highly improved accuracy.

Compared to the existing CPX trailers, it is validated that this newly constructed Mark III trailer has an outstanding absorption performance and enhanced noise isolation property. Such kinds of specifications contribute significantly to the lower background noise level by around 3 dB during the road tests at a speed of 50 km/h. Based on this Mark III trailer, a completely new methodology for the sound power measurement of the tyre/road noise is developed and it provides the most accurate measurement results in the research areas of the tyre/road noise.

Team Member(s):

LI Dong Fang

Dr. LEUNG Chi Kin, Randolph