标准摘要
[中文适用范围]： 本文件描述了一种现场测量路面吸声系数的测试方法，该系数是 250 Hz 至 4 kHz 范围内频率的函数。 假设发生率为正态。 然而，该测试方法可以应用于斜入射，但有一些限制（见附录 F）。 该测试方法适用于以下应用： ——测定实际使用中路面的吸声性能； ——路面吸声设计规范与施工完成后路面实际性能数据的比较。 复反射因子也可以通过该方法确定。 [外文原描述]： This document describes a test method for measuring in situ the sound absorption coefficient of road surfaces as a function of frequency in the range from 250 Hz to 4 kHz. Normal incidence is assumed. However, the test method can be applied at oblique incidence although with some limitations (see Annex F). The test method is intended for the following applications: — determination of the sound absorption properties of road surfaces in actual use; — comparison of sound absorption design specifications of road surfaces with actual performance data of the surface after completion of the construction work. The complex reflection factor can also be determined by this method.
英文名称Acoustics — Measurement of sound absorption properties of road surfaces in situ — Part 1: Extended surface method