scope:

This International Standard specifies the essential characteristics of a test surface intended to be used for measuring vehicle and tyre/road noise emissions.

The surface design given in this International Standard:

- produces consistent levels of tyre/road sound emission under a wide range of operating conditions including those appropriate to vehicle sound testing;

- minimizes inter-site variation;

- provides minor absorption of the vehicle sound sources;

- is consistent with road-building practice.

NOTE For the purposes of this International Standard, the terms noise and sound are used interchangeably.