FprEN ISO 9053-1

Acoustics - Determination of airflow resistance - Part 1: Static method (ISO/FDIS 9053-1:2026)

This document specifies the measurement of the determination of the static airflow resistance (see also References[1]and2) in a laminar flow regime, of porous materials for acoustical applications.

Akustik - Bestimmung des Strömungswiderstandes - Teil 1: Statisches Verfahren (ISO/FDIS 9053‑1:2026)

Dieses Dokument legt die Messung der Bestimmung des statischen Strömungswiderstands (siehe auch Verweisungen [1], [2]) von porösen Materialien für akustische Anwendungen in einer Anordnung mit laminarer Strömung fest.

Acoustique - Détermination de la résistance à l'écoulement de l'air - Partie 1: Méthode statique (ISO/FDIS 9053-1:2026)

Le présent document spécifie le mesurage de la résistance statique à l’écoulement de l’air (voir également les Références [1]et[2]) en régime d’écoulement laminaire, des matériaux poreux utilisés pour les applications acoustiques.

Akustika - Ugotavljanje upornosti zračnemu toku - 1. del: Metoda statičnega zračnega toka (ISO/FDIS 9053-1:2026)

General Information

• Status: Not Published
• Publication Date: 03-Aug-2026
• ICS: 17.140.01 - Acoustic measurements and noise abatement in general
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: CEN/TC 126 - Acoustic properties of building products and of buildings
• Drafting Committee: CEN/TC 126 - Acoustic properties of building products and of buildings
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 01-May-2026
• Completion Date: 01-May-2026
• Ref Project: kSIST FprEN ISO 9053-1:2026 - Acoustics - Determination of airflow resistance - Part 1: Static method (ISO/FDIS 9053-1:2026)

Relations

• Consolidated By: ISO 9053-1 - Acoustics — Determination of airflow resistance — Part 1: Static method
• Effective Date: 12-Feb-2026
• Revises: EN ISO 9053-1:2018 - Acoustics - Determination of airflow resistance - Part 1: Static airflow method (ISO 9053-1:2018)
• Effective Date: 05-Nov-2024

Overview

FprEN ISO 9053-1: Acoustics - Determination of Airflow Resistance - Part 1: Static Method (ISO/FDIS 9053-1:2026) is the international standard developed by CEN and ISO for measuring the static airflow resistance of porous materials used in acoustical applications. This standard provides a reliable, repeatable method to assess the ability of materials-such as foams, fibrous products, and granular composites-to resist the passage of air in a laminar flow regime. Static airflow resistance is a key material property influencing the acoustic performance, particularly sound absorption, noise reduction, and thermal insulation of building components.

By defining a consistent measurement technique, FprEN ISO 9053-1 ensures that manufacturers, laboratories, and quality control entities can accurately compare the acoustic properties of materials and meet regulatory or market requirements.

Key Topics

• Static Airflow Resistance Measurement: Establishes procedures for determining the resistance offered by porous materials to steady, unidirectional, low-velocity airflow.
• Laminar Flow Regime: Focuses on measuring airflow resistance under conditions where airflow is smooth and consistent, avoiding turbulence effects.
• Test Specimen Requirements: Specifies the shape, dimensions, and amount of test specimens to ensure representative and comparable results.
• Measurement Equipment: Details requirements for the measurement cell, airflow generation, volumetric airflow measurement, and differential pressure devices.
• Calibration Practices: Recommends regular calibration using standardized or theoretically predictable specimens to ensure measurement accuracy.
• Reporting Guidelines: Outlines all essential data and conditions to be included in the test report for full transparency and repeatability.

Applications

FprEN ISO 9053-1 is critical to various industries and applications, particularly where sound insulation and acoustical materials are employed:

• Building Acoustics: Determining airflow resistance of insulation used in walls, ceilings, and floors to optimize sound absorption and reduce transmission.
• Product Development: Assisting manufacturers of acoustic panels, baffles, and partitions in material selection and quality control.
• Quality Assurance: Providing a standardized reference for comparing the performance of batches or types of porous acoustic materials.
• Research and Development: Enabling researchers and laboratories to characterize new or innovative noise control materials comprehensively.
• Regulatory Compliance: Supporting compliance with building codes and regulatory standards that specify minimum requirements for sound insulation and airflow performance.

Related Standards

Compliance with FprEN ISO 9053-1 is complemented by an ecosystem of international and European standards. Relevant references include:

• ISO 9237 – Textiles: Determination of the permeability of fabrics to air. Focuses on higher-pressure drops, primarily for textile materials.
• ISO 4638 – Polymeric Materials: Determination of air flow permeability in flexible, cellular polymeric materials.
• FprEN ISO 10534-2 – Acoustics: Determination of sound absorption coefficient and impedance in impedance tubes.
• ISO/TC 43/SC 2 – Building Acoustics: Technical committee responsible for ongoing development and maintenance of standards in this field.

Adhering to FprEN ISO 9053-1 helps ensure consistent and reliable measurement of airflow resistance, underpinning effective sound control in construction, product manufacturing, and scientific research.

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By implementing the static airflow resistance method described in FprEN ISO 9053-1, organizations benefit from enhanced material characterization, optimized acoustic performance, and improved compliance with international best practices in building acoustics and noise abatement.

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 9053-1:2025
01-julij-2025
Akustika - Ugotavljanje upornosti zračnemu toku - 1. del: Metoda statičnega
zračnega toka (ISO/DIS 9053-1:2025)
Acoustics - Determination of airflow resistance - Part 1: Static airflow method (ISO/DIS
9053-1:2025)
Akustik - Bestimmung des Strömungswiderstandes - Teil 1: Verfahren mit statischer
Luftströmung (ISO/DIS 9053-1:2025)
Acoustique - Détermination de la résistance à l'écoulement de l'air - Partie 1: Méthode
statique (ISO/DIS 9053-1:2025)
Ta slovenski standard je istoveten z: prEN ISO 9053-1
ICS:
17.140.01 Akustična merjenja in Acoustic measurements and
blaženje hrupa na splošno noise abatement in general
91.100.60 Materiali za toplotno in Thermal and sound insulating
zvočno izolacijo materials
oSIST prEN ISO 9053-1:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 9053-1:2025
oSIST prEN ISO 9053-1:2025
DRAFT
International
Standard
ISO/DIS 9053-1
ISO/TC 43/SC 2
Acoustics — Determination of
Secretariat: DIN
airflow resistance —
Voting begins on:
Part 1: 2025-05-15
Static airflow method
Voting terminates on:
2025-08-07
Acoustique — Détermination de la résistance à l'écoulement de
l'air —
Partie 1: Méthode statique
ICS: 91.100.60
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 9053-1:2025(en)
oSIST prEN ISO 9053-1:2025
DRAFT
ISO/DIS 9053-1:2025(en)
International
Standard
ISO/DIS 9053-1
ISO/TC 43/SC 2
Acoustics — Determination of
Secretariat: DIN
airflow resistance —
Voting begins on:
Part 1:
Static airflow method
Voting terminates on:
Acoustique — Détermination de la résistance à l'écoulement
de l'air —
Partie 1: Méthode statique
ICS: ISO ics
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 9053-1:2025(en)
ii
oSIST prEN ISO 9053-1:2025
ISO/DIS 9053-1:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Equipment . 3
5.1 General .3
5.2 Measurement cell .3
5.3 Device for producing airflow .4
5.4 Device for measuring volumetric airflow .4
5.5 Device for measuring differential pressure .4
5.6 Use of calibration test specimens .5
6 Test specimens . 5
6.1 Shape .5
6.2 Dimensions .6
6.2.1 Lateral dimensions .6
6.2.2 Thickness .6
6.3 Number of test specimens .6
7 Test procedure . 6
8 Precision . 7
9 Test report . 7
Annex A (informative) Estimation of the static airflow resistivity . 8
Bibliography . 9

iii
oSIST prEN ISO 9053-1:2025
ISO/DIS 9053-1:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL:
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building
acoustics.
This first edition of ISO 9053-1 cancels and replaces ISO 9053-1:2018, which has been technically revised.
The main changes are as follows:
— Figure 1 was corrected;
— addition of a Note to design calibration specimens in 5.6.
A list of all parts in the ISO 9053 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
oSIST prEN ISO 9053-1:2025
DRAFT International Standard ISO/DIS 9053-1:2025(en)
Acoustics — Determination of airflow resistance —
Part 1:
Static airflow method
1 Scope
This document specifies the measurement of the determination of the static airflow resistance (see also [1],
[2]) in a laminar flow regime, of porous materials for acoustical applications.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
airflow resistance
R
quantity defined by
Δp
R=
q
v
where
Δp is the air pressure difference, in pascal, across the test specimen with respect to the atmosphere;
q is the volumetric airflow rate, in cubic metre per second, passing through the test specimen.
v
Note 1 to entry: It is expressed in pascal second per cubic metre.
3.2
specific airflow resistance
R
s
quantity defined by
RR=×A
s
where
oSIST prEN ISO 9053-1:2025
ISO/DIS 9053-1:2025(en)
R is the airflow resistance, in pascal second per cubic metre, of the test specimen;
A is the cross-section area, in square metre, of the test specimen perpendicular to the direction of flow.
Note 1 to entry: It is expressed in pascal second per metre.
3.3
airflow resistivity
σ
quantity defined by the following formula if the material is considered as being homogeneous
R
s
σ =
d
where
R is the specific airflow resistance, in pascal second per metre, of the test specimen;
s
d is the thickness, in metre, of the test specimen in the direction of flow.
Note 1 to entry: lt is expressed in pascal second per square metre.
3.4
linear airflow velocity
u
quantity defined by
q
v
u=
A
where
q is the volumetric airflow rate, in cubic metre per second, passing through the test specimen;
v
A is the cross-sectional area, in square metre, of the test specimen.
Note 1 to entry: lt is expressed in metre per second.
3.5
permeability
k
quantity defined by the following equation if the material is considered as being homogeneous
η
k =
σ
where
−5
η is the dynamic viscosity of air in newton second per square metre (approximately 1,82 × 10 for the
air at 20 °C and 1 atmosphere of static pressure);
σ is the static airflow resistivity in pascal second per square metre, of the test specimen.
Note 1 to entry: lt is expressed in square metres.

oSIST prEN ISO 9053-1:2025
ISO/DIS 9053-1:2025(en)
4 Principle
Figure 1 — Basic principle
The principle of the method, as described in Figure 1, is to measure the pressure drop between the two
free faces of a test specimen (in the form of a circular cylinder or a rectangular parallelepiped) while it is
subjected to a controlled unidirectional airflow.
5 Equipment
5.1 General
The equipment shall consist of:
a) a measurement cell into which the test specimen is placed;
b) a device for producing a steady airflow;
c) a device for measuring the volumetric airflow;
d) a device for measuring the pressure difference across the test specimen;
e) a device for measuring the thickness of the test specimen when it is in position for the test.
All devices used for measurements [c), d), e)] should be calibrated using their conventional calibration
methods at least once every 2 a.
5.2 Measurement cell
The measurement cell shall be in the shape of a circular cylinder or a rectangular parallelepiped (preferably
with a squa
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