声学.测量道路车辆及其轮胎发出的声音的试验轨道规范

[中文适用范围]： 本文件规定了用于测量车辆及其轮胎的滚动声发射的测试跑道表面的基本特征。 本文件中给出的表面设计 — 在各种操作条件下产生一致的轮胎或道路声音发射水平，包括适合车辆声音测试的条件， — 最大限度地减少现场变化， — 限制车辆声源的吸收，以及 —与道路建设实践相一致。 [外文原描述]： This document specifies the essential characteristics of a test track surface intended to be used for measuring rolling sound emission of vehicles and their tyres. The surface design given in this document — produces consistent levels of tyre or road sound emission under a wide range of operating conditions including those appropriate to vehicle sound testing, — minimizes inter-site variation, — limits absorption of the vehicle sound sources, and — is consistent with road-building practice.