ISO 13472-1:2022

International Standard   Current Edition
Approved on  05 January 2022

Acoustics — Measurement of sound absorption properties of road surfaces in situ — Part 1: Extended surface method

Road construction materials
Including asphalts, road pavements, etc.
Noise emitted by means of transport
Including road noise, railway noise, harbour noise and airport noise

ISO 13472-1:2022 Files

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Current Edition

ISO 13472-1:2022 Scope

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.

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