EN ISO 10140-2:2021

SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN ISO 10140-2:2010
Akustika - Laboratorijsko merjenje zvočne izolirnosti gradbenih elementov - 2. del:
Merjenje izolirnosti pred zvokom v zraku (ISO 10140-2:2021)
Acoustics - Laboratory measurement of sound insulation of building elements - Part 2:
Measurement of airborne sound insulation (ISO 10140-2:2021)
Akustik - Messung der Schalldämmung von Bauteilen im Prüfstand - Teil 2: Messung der
Luftschalldämmung (ISO 10140-2:2021)
Acoustique - Mesurage en laboratoire de l'isolation acoustique des éléments de
construction - Partie 2: Mesurage de l'isolation au bruit aérien (ISO 10140-2:2021)
Ta slovenski standard je istoveten z: EN ISO 10140-2:2021
ICS:
17.140.01 Akustična merjenja in Acoustic measurements and
blaženje hrupa na splošno noise abatement in general
91.060.01 Stavbni elementi na splošno Elements of buildings in
general
91.120.20 Akustika v stavbah. Zvočna Acoustics in building. Sound
izolacija insulation
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 10140-2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 91.120.20 Supersedes EN ISO 10140-2:2010
English Version
Acoustics - Laboratory measurement of sound insulation
of building elements - Part 2: Measurement of airborne
sound insulation (ISO 10140-2:2021)
Acoustique - Mesurage en laboratoire de l'isolation Akustik - Messung der Schalldämmung von Bauteilen
acoustique des éléments de construction - Partie 2: im Prüfstand - Teil 2: Messung der Luftschalldämmung
Mesurage de l'isolation au bruit aérien (ISO 10140- (ISO 10140-2:2021)
2:2021)
This European Standard was approved by CEN on 24 April 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10140-2:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 10140-2:2021) 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 November 2021, and conflicting national standards
shall be withdrawn at the latest by November 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.
This document supersedes EN ISO 10140-2:2010.
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 10140-2:2021 has been approved by CEN as EN ISO 10140-2:2021 without any
modification.
INTERNATIONAL ISO
STANDARD 10140-2
Second edition
2021-04
Acoustics — Laboratory measurement
of sound insulation of building
elements —
Part 2:
Measurement of airborne sound
insulation
Acoustique — Mesurage en laboratoire de l'isolation acoustique des
éléments de construction —
Partie 2: Mesurage de l'isolation au bruit aérien
Reference number
ISO 10140-2:2021(E)
©
ISO 2021
ISO 10140-2:2021(E)
© ISO 2021
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 10140-2:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Facilities and equipment . 3
5 Test procedure and evaluation . 3
5.1 General procedure . 3
5.2 Sound field in the source room . 4
5.3 Data processing . 4
5.4 Expression of results . 4
6 Test arrangement . 5
6.1 General . 5
6.2 Full-size test opening. 5
6.3 Reduced-size test opening . 6
6.4 Reduced-size test elements . 6
6.5 Small technical elements . 6
7 Limits of performance . 7
7.1 Full-size openings . 7
7.2 Reduced-size openings . 7
8 Measurement uncertainty . 8
9 Test report . 8
Annex A (normative) Measurement of sound transmission through the filler wall and any
flanking construction for small-sized or reduced-size test openings .9
Annex B (informative) Form for the expression of results .11
Bibliography .14
ISO 10140-2:2021(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, in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC 126, Acoustic properties of building elements and of buildings, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 10140-2:2010), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— all references in the text have been updated;
— in Clause 2, the normative references have been updated;
— in Clause 3, the terms and definitions have been updated;
— in Clause 8, the title has been changed to “Measurement uncertainty”.
A list of all parts in the ISO 10140 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 2021 – All rights reserved

ISO 10140-2:2021(E)
Introduction
ISO 10140 (all parts) concerns laboratory measurement of the sound insulation of building elements
(see Table 1).
ISO 10140-1 specifies the application rules for specific elements and products, including specific
requirements for the preparation and mounting of the test elements, and for the operating and test
conditions. This document and ISO 10140-3 contain the general procedures for airborne and impact
sound insulation measurements, respectively, and refer to ISO 10140-4 and ISO 10140-5 where
appropriate. For elements and products without a specific application rule described in ISO 10140-1, it is
possible to apply this document and ISO 10140-3. ISO 10140-4 contains basic measurement techniques
and processes. ISO 10140-5 contains requirements for test facilities and equipment. For the structure of
ISO 10140 (all parts), see Table 1.
ISO 10140 (all parts) was developed to improve the layout for laboratory measurements, ensure
consistency and simplify future changes and additions regarding mounting conditions of test elements
in laboratory and field measurements. ISO 10140 (all parts) aims at presenting a well-written and
arranged format for laboratory measurements.
ISO 10140-1 is planned to be updated with application rules for other products.
Table 1 — Structure and contents of ISO 10140 (all parts)
Relevant Main purpose, contents and use Detailed content
part of
ISO 10140
ISO 10140-1 It indicates the appropriate test procedure Appropriate references to ISO 10140-2 and
for elements and products. For certain types ISO 10140-3 and product-related, specific and
of element/product, it can contain addi- additional instructions on:
tional and more specific instructions about
— specific quantities measured;
quantities and test element size and about
preparation, mounting and operating condi-
— size of test element;
tions. Where no specific details are includ-
ed, the general guidelines are according to
— boundary and mounting conditions;
ISO 10140-2 and ISO 10140-3.
— conditioning, testing and operating
conditions;
— additional specifics for test report.
ISO 10140-2 It gives a procedure for airborne sound insu- — Definitions of main quantities measured
lation measurements according to ISO 10140-
— General mounting and boundary conditions
4 and ISO 10140-5. For products without
specific application rules, it is sufficiently
— General measurement procedure
complete and general for the execution of
measurements. However, for products with
— Data processing
specific application rules, measurements
are carried out according to ISO 10140-1, if
— Test report (general points)
available.
ISO 10140-3 It gives a procedure for impact sound insula- — Definitions of main quantities measured
tion measurements according to ISO 10140-
— General mounting and boundary conditions
4 and ISO 10140-5. For products without
specific application rules, it is sufficiently
— General measurement procedure
complete and general for the execution of
measurements. However, for products with
— Data processing
specific application rules, measurements
are carried out according to ISO 10140-1, if
— Test report (general points)
available.
ISO 10140-2:2021(E)
Table 1 (continued)
Relevant Main purpose, contents and use Detailed content
part of
ISO 10140
ISO 10140-4 It gives all the basic measurement techniques — Definitions
and processes for measurement according
— Frequency range
to ISO 10140-2 and ISO 10140-3 or facility
qualifications according to ISO 10140-5. Much
— Microphone positions
of the content is implemented in software.
— SPL measurements
— Averaging, space and time
— Correction for background noise
— Reverberation time measurements
— Loss factor measurements
— Low-frequency measurements
— Radiated sound power by velocity
measurement
ISO 10140-5 It specifies all information needed to design, Test facilities, design criteria:
construct and qualify the laboratory facility,
— volumes, dimensions;
its additional accessories and measurement
equipment (hardware).
— flanking transmission;
— laboratory loss factor;
— maximum achievable sound reduction index;
— reverberation time;
— influence of lack of diffusivity in the
laboratory.
Test openings:
— standard openings for walls and floors;
— other openings (windows, doors, small
technical elements);
— filler walls in general.
Requirements for equipment:
— loudspeakers, number, positions;
— tapping machine and other impact sources;
— measurement equipment.
Reference constructions:
— basic elements for airborne and impact
insulation improvement;
— corresponding reference performance
curves.
vi © ISO 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 10140-2:2021(E)
Acoustics — Laboratory measurement of sound insulation
of building elements —
Part 2:
Measurement of airborne sound insulation
1 Scope
This document specifies a laboratory method for measuring the airborne sound insulation of building
products, such as walls, floors, doors, windows, shutters, façade elements, façades, glazing, small
technical elements, for instance transfer air devices, airing panels (ventilation panels), outdoor air
intakes, electrical raceways, transit sealing systems and combinations, for example walls or floors with
linings, suspended ceilings or floating floors.
The test results can be used to compare the sound insulation properties of building elements, classify
elements according to their sound insulation capabilities, help design building products which require
certain acoustic properties and estimate the in situ performance in complete buildings.
The measurements are performed in laboratory test facilities in which sound transmission via flanking
paths is suppressed. The results of measurements made in accordance with this document are not
applicable directly to the field situation without accounting for other factors affecting sound insulation,
such as flanking transmission, boundary conditions and total loss factor.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 717-1, Acoustics — Rating of sound insulation in buildings and of building elements — Part 1: Airborne
sound insulation
ISO 10140-1, Acoustics — Laboratory measurement of sound insulation of building elements — Part 1:
Application rules for specific products
ISO 10140-4, Acoustics — Laboratory measurement of sound insulation of building elements — Part 4:
Measurement procedures and requirements
ISO 10140-5, Acoustics — Laboratory measurement of sound insulation of building elements — Part 5:
Requirements for test facilities and equipment
ISO 12999-1, Acoustics — Determination and application of measurement uncertainties in building
acoustics — Part 1: Sound insulation
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 http:// www .electropedia .org/
ISO 10140-2:2021(E)
3.1
sound reduction index
R
ten times the common logarithm of the ratio of the sound power, W , that is incident on the test element
to the sound power, W , radiated by the test element to the other side, expressed by
W
R=10 lg (1)
W
Note 1 to entry: R is expressed in decibels.
Note 2 to entry: For laboratory measurements using sound pressure, the sound reduction index is calculated using:
S
RL=−L +10 lg (2)
A
where
L is the energy average sound pressure level in the source room, in decibels;
L is the energy average sound pressure level in the receiving room, in decibels;
S is the area of the free test opening in which the test element is installed, in square metres;
A is the equivalent sound absorption area in the receiving room, in square metres.
Note 3 to entry: The derivation of Formula (2) from Formula (1) assumes that the sound fields are diffuse and
that the only sound radiated into the receiving room is from the test element.
Note 4 to entry: The expression “sound transmission loss” (TL) is also in use in English-speaking countries. It is
equivalent to “sound reduction index”.
Note 5 to entry: Related quantities can be introduced in other documents or test codes, often by adding subscripts,
i.e. R for the sound reduction index as measured by intensity methods, R as the sound reduction index per unit
I s
length of slits or ΔR as the improvement in sound reduction index by linings or suspended ceilings.
3.2
apparent sound reduction index
R'
ten times the common logarithm of the ratio of the sound power, W , that is incident on a test element to
the total sound power radiated into the receiving room if, in addition to the sound power, W , radiated
by the test element, the sound power, W , radiated by flanking elements or by other components is
significant, expressed by
 W 
R′=10 lg (3)
 
WW+
 
Note 1 to entry: R' is expressed in decibels.
Note 2 to entry: In general, the sound power transmitted into the receiving room consists of the sum of several
components. Also, in this case, under the assumption that there are diffuse sound fields in the two rooms, the
apparent sound reduction index is evaluated from Formula (4).
S
R'=−LL +10 lg (4)
A
Thus, in the apparent sound reduction index, the sound power transmitted into the receiving room is related to
the sound power that is incident on the test element, as in Formula (2), irrespective of the actual conditions of
transmission.
2 © ISO 2021 – All rights reserved

ISO 10140-2:2021(E)
3.3
element-normalized level difference
D
n,e
level difference corresponding to a reference value of absorption area in the receiving room with sound
transmission through the small technical element only, expressed by
A
 
DL=−L +10 lg (5)
 
n,e 12
A
 
where
L is the energy average sound pressure level in the source room, in decibels;
L is the energy average sound pressure level in the receiving room, in decibels;
A is the reference absorption area, in square metres (for the laboratory, A = 10 m );
0 0
A is the equivalent absorption area in the r
...