轮胎 - 用于测量轮胎到道路声音发射的海岸线测量方法

[中文适用范围]： 本文件规定了在沿海条件下（即当车辆处于自由滚动、无动力运行时）安装在机动车辆上的轮胎的轮胎到道路声音发射的测量方法。 这通常是通过将变速器置于空档或等效位置并关闭发动机以及安全驾驶所不需要的所有辅助系统来实现的。 本文件适用于 ISO 3833 中定义的乘用车和商用车。 它不适用于确定在动力条件下运行的车辆轮胎的声音贡献，也不适用于确定给定位置的交通噪音滋扰。 [外文原描述]： This document specifies methods for measuring tyre-to-road sound emissions from tyres fitted on a motor vehicle under coast-by conditions, i.e. when the vehicle is in free-rolling, non-powered operation. This is typically achieved by putting the transmission in the neutral or equivalent position and switching off the engine as well as all auxiliary systems not necessary for safe driving. This document is applicable to passenger cars and commercial vehicles as defined in ISO 3833. It is not intended to be used to determine the sound contribution of tyres of vehicles running in powered condition nor for the determination of traffic sound nuisance at a given location.