ISO 13472-2:2025
ISO 13472-2:2025 Acoustics — Measurement of sound absorption properties of road surfaces in situ — Part 2: Spot method for reflective surfaces
CDN $251.00
This publication was last reviewed and confirmed in 2025.
Acoustics — Measurement of sound absorption properties of road surfaces in situ — Part 2: Spot method for reflective surfaces
Description
This document specifies a test method for measuring in situ the sound absorption coefficient of road surfaces for the one-third octave band frequencies ranging from 250 Hz to 1 600 Hz under normal incidence conditions. If necessary for practical applications the diameter of the tube can be reduced to 80 mm. This will increase the upper boundary of the frequency range to 2 000 Hz one-third octave band (see REF Section_sec_5.4 r h 5.4
08D0C9EA79F9BACE118C8200AA004BA90B020000000800000010000000530065006300740069006F006E005F007300650063005F0035002E0034000000
) but reduces the area under test.
The test method is intended for the following applications:
— determination of the sound absorption coefficient (and, if of interest, also the complex acoustical impedance) of semi-dense to dense road surfaces;
— determination of the sound absorption properties of test tracks according to ISO 10844[
REF Reference_ref_4 r h 2
08D0C9EA79F9BACE118C8200AA004BA90B0200000008000000100000005200650066006500720065006E00630065005F007200650066005F0034000000
] or other similar standards and test surfaces defined in national and international type approval regulations for road vehicles and their tyres;
— verification of the compliance of the sound absorption coefficient of a road surface with design-specifications or other requirements.
Edition
2
Published Date
2026-06-19
Status
PUBLISHED
Pages
25
Language
English
Format
Secure PDF
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Abstract
This document specifies a test method for measuring in situ the sound absorption coefficient of road surfaces for the one-third octave band frequencies ranging from 250 Hz to 1 600 Hz under normal incidence conditions. If necessary for practical applications the diameter of the tube can be reduced to 80 mm. This will increase the upper boundary of the frequency range to 2 000 Hz one-third octave band (see REF Section_sec_5.4 r h 5.4 08D0C9EA79F9BACE118C8200AA004BA90B020000000800000010000000530065006300740069006F006E005F007300650063005F0035002E0034000000 ) but reduces the area under test.
The test method is intended for the following applications:
— determination of the sound absorption coefficient (and, if of interest, also the complex acoustical impedance) of semi-dense to dense road surfaces;
— determination of the sound absorption properties of test tracks according to ISO 10844[ REF Reference_ref_4 r h 2 08D0C9EA79F9BACE118C8200AA004BA90B0200000008000000100000005200650066006500720065006E00630065005F007200650066005F0034000000 ] or other similar standards and test surfaces defined in national and international type approval regulations for road vehicles and their tyres;
— verification of the compliance of the sound absorption coefficient of a road surface with design-specifications or other requirements.
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