oSIST prEN ISO 9053-1:2025

SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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
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Reference number
ISO/DIS 9053-1:2025(en)
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
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Published in Switzerland Reference number
ISO/DIS 9053-1:2025(en)
ii
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
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,
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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
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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
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
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.

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
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