EN ISO 9053-2:2020

SLOVENSKI STANDARD
01-december-2020
Akustika - Ugotavljanje upora pretoku zraka - 2. del: Metoda izmeničnega pretoka
zraka (ISO 9053-2:2020)
Acoustics - Determination of airflow resistance - Part 2: Alternating airflow method (ISO
9053-2:2020)
Akustik - Bestimmung des Strömungswiderstandes - Teil 2: Alternierendes
Strömungsverfahren (ISO 9053-2:2020)
Acoustique - Détermination de la résistance à l’écoulement de l’air - Partie 2: Méthode
avec écoulement d’air alternatif (ISO 9053-2:2020)
Ta slovenski standard je istoveten z: EN ISO 9053-2:2020
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.

EN ISO 9053-2
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2020
EUROPÄISCHE NORM
ICS 91.100.60
English Version
Acoustics - Determination of airflow resistance - Part 2:
Alternating airflow method (ISO 9053-2:2020)
Acoustique - Détermination de la résistance à Akustik - Bestimmung des Strömungswiderstandes -
l'écoulement de l'air - Partie 2: Méthode avec Teil 2: Alternierendes Strömungsverfahren (ISO 9053-
écoulement d'air alternatif (ISO 9053-2:2020) 2:2020)
This European Standard was approved by CEN on 22 September 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9053-2:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 9053-2:2020) has been prepared by Technical Committee ISO/TC 43
"Acoustics" in collaboration with Technical Committee CEN/TC 126 “Acoustic properties of building
elements and of buildings” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2021, and conflicting national standards shall be
withdrawn at the latest by April 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 9053-2:2020 has been approved by CEN as EN ISO 9053-2:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 9053-2
First edition
2020-09
Acoustics — Determination of airflow
resistance —
Part 2:
Alternating airflow method
Acoustique — Détermination de la résistance à l’écoulement de l’air —
Partie 2: Méthode avec écoulement d’air alternatif
Reference number
ISO 9053-2:2020(E)
©
ISO 2020
ISO 9053-2:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 9053-2:2020(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3  Terms and definitions . 1
4  Symbols . 3
5  Principle . 5
6 Equipment . 6
6.1 General . 6
6.2 Device for producing the alternating airflow . 6
6.3 Sound measuring device . 7
6.4 Vessel and measurement cell . 7
6.5 Device for measuring the static pressure . 8
6.6 Device for measuring the frequency of the piston . 8
7 Test specimens. 8
7.1 Homogeneity of test specimen . 8
7.2 Shape . 8
7.3 Dimensions . 8
7.3.1 Lateral dimensions . . 8
7.3.2 Thickness . 9
7.4 Number of test specimens . 9
8  Test procedure . 9
9 Uncertainty .10
10 Test report .11
Annex A (normative) Effective ratio of specific heats for air .12
Annex B (informative) Acoustic model of the flow .15
Annex C (informative) Calculation of uncertainty .17
Annex D (informative) Airflow resistance of perforated support .19
Bibliography .20
ISO 9053-2:2020(E)
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 of 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 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 9053-2, together with ISO 9053-1:2018, cancels and replaces ISO 9053:1991,
which has been technically revised.
The main changes compared to the previous edition are as follows:
— the former method B in ISO 9053:1991 has been transferred to this document;
— the requirement to the dimensions of the test specimen have been updated;
— a correction for heat conduction has been added.
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 © ISO 2020 – All rights reserved

INTERNATIONAL STANDARD ISO 9053-2:2020(E)
Acoustics — Determination of airflow resistance —
Part 2:
Alternating airflow method
1 Scope
This document specifies an alternating airflow method for the determination of the air
...