本文件规定了使用ISO 11819-2中规定的近距离（CPX）方法时用作参考轮胎的两个轮胎。 CPX方法是一种在轮胎/道路噪声占主导地位的情况下，评估不同路面对交通噪声影响的方法。理想情况下，该方法要求使用标准化轮胎，其噪声特性广泛代表了路面对乘用车和重型车辆轮胎噪声排放的影响。然而，ISO 11819-2中未规定此类轮胎。本文件旨在规定这些标准化轮胎。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies two tyres intended to serve as reference tyres when using the close-proximity (CPX) method specified in ISO 11819-2. The CPX method is a method for evaluating different road surfaces with respect to their influence on traffic noise, under conditions when tyre/road noise dominates. This method ideally requires the use of standardized tyres, which have noise characteristics that are broadly representative of the effect of road surfaces on the noise emission of passenger car and heavy vehicle tyres. However, such tyres are not specified in ISO 11819-2. This document serves to specify these standardized tyres.All current amendments available at time of purchase are included with the purchase of this document.