ISO 13472-1:2002 PDF

Scope: This part of ISO 13472 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 test tracks according to ISO 10844, with limitations, and other similar standards; — 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.

ISO 13472-1:2002 Referenced Document

IEC 60651 Sound Level Meters (Edition 1.2; Edition 1:1979 Consolidated with Amendments 1:1993 and 2:2000; Replaced by IEC 61672-1:2002 and IEC 61672-2: 2003)
IEC 61260 Amendment 1 - Electroacoustics - Octave-band and fractional-octave-band filters
ISO 10534-1 Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes - Part 1: Method using standing wave ratio
ISO 10534-2 Acoustics — Determination of acoustic properties in impedance tubes — Part 2: Two-microphone technique for normal sound absorption coefficient and normal surface impedance*， 2023-10-06 Update

2022 ISO 13472-1:2022 Acoustics — Measurement of sound absorption properties of road surfaces in situ — Part 1: Extended surface method
2002 ISO 13472-1:2002 Acoustics - Measurement of sound absorption properties of road surfaces in situ - Part 1: Extended surface method