SIST EN ISO 10848-5:2020

Acoustics - Laboratory and field measurement of the flanking transmission for airborne, impact and building service equipment sound between adjoining rooms - Part 5: Radiation efficiencies of building elements (ISO 10848-5:2020)

ISO 10848 (all parts) specifies measurement methods to characterize the flanking transmission of one
or several building components. This document considers only laboratory measurements.
This part of ISO 10848 specifies measurement methods to be performed in a laboratory to characterize
the acoustic radiation of a building element when mechanically or acoustically excited. The measured
quantities can be used to compare products, or to express a requirement, or as input data for prediction
methods, such as ISO 12354-1 and -2.

Akustik - Messung der Flankenübertragung von Luftschall und Trittschall zwischen benachbarten Räumen im Prüfstand - Teil 5: Strahlungswirksamkeit von Bauelementen (ISO 10848-5:2020)

Dieses Dokument legt Messverfahren zur Charakterisierung der akustischen Abstrahlung eines Bauteils im Prüfstand fest, wenn es direkt von einer Luft  oder Körperschallquelle angeregt wird. Er gilt für ein  und zweischalige Bauteile (siehe ISO 12354 1:2017, Anhang F, F2). Die gemessenen Größen können als Eingabedaten für Berechnungsverfahren wie in ISO 12354 1 und ISO 12354 2 angegeben verwendet werden, um Produkte zu vergleichen oder um eine Anforderung festzulegen.

Acoustique - Mesurage en laboratoire et sur site des transmissions latérales du bruit aérien, des bruits de choc et du bruit d’équipement technique de bâtiment entre des pièces adjacentes - Partie 5: Efficacité de rayonnement des éléments de construction (ISO 10848-5:2020)

Le présent document spécifie les méthodes de mesure pour la caractérisation en laboratoire du rayonnement acoustique d'un élément de construction lorsqu'il est directement excité par une source aérienne ou solidienne. Il est applicable aux éléments de paroi simple ou double (voir l'ISO 12354-1:2017, Annexe F, F2). La grandeur mesurée peut être utilisée comme donnée d'entrée des méthodes de prévision telles que l'ISO 12354-1 et l'ISO 12354-2, pour comparer des produits ou pour exprimer une exigence.

Akustika - Laboratorijsko in terensko merjenje bočnega prenosa zvoka v zraku, udarnega zvoka in zvoka v gradbenih elementih servisne opreme med mejnimi prostori - 5. del: Učinkovitost sevanja gradbenih elementov (ISO 10848-5:2020)

General Information

• Status: Published
• Public Enquiry End Date: 19-Dec-2019
• Publication Date: 15-Nov-2020
• ICS: 17.140.01 - Acoustic measurements and noise abatement in general
• ICS: 91.120.20 - Acoustics in building. Sound insulation
• Technical Committee: AKU - Acoustics
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-Oct-2020
• Due Date: 24-Dec-2020
• Completion Date: 16-Nov-2020
• Ref Project: EN ISO 10848-5:2020 - Acoustics - Laboratory and field measurement of the flanking transmission for airborne, impact and building service equipment sound between adjoining rooms - Part 5: Radiation efficiencies of building elements (ISO 10848-5:2020)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 10848-5:2020
01-december-2020
Akustika - Laboratorijsko in terensko merjenje bočnega prenosa zvoka v zraku,
udarnega zvoka in zvoka v gradbenih elementih servisne opreme med mejnimi
prostori - 5. del: Učinkovitost sevanja gradbenih elementov (ISO 10848-5:2020)
Acoustics - Laboratory and field measurement of the flanking transmission for airborne,
impact and building service equipment sound between adjoining rooms - Part 5:
Radiation efficiencies of building elements (ISO 10848-5:2020)
Akustik - Messung der Flankenübertragung von Luftschall und Trittschall zwischen
benachbarten Räumen im Prüfstand - Teil 5: Strahlungswirksamkeit von Bauelementen
(ISO 10848-5:2020)
Acoustique - Mesurage en laboratoire et sur site des transmissions latérales du bruit
aérien, des bruits de choc et du bruit d’équipement technique de bâtiment entre des
pièces adjacentes - Partie 5: Efficacité de rayonnement des éléments de construction
(ISO 10848-5:2020)
Ta slovenski standard je istoveten z: EN ISO 10848-5:2020
ICS:
17.140.01 Akustična merjenja in Acoustic measurements and
blaženje hrupa na splošno noise abatement in general
91.120.20 Akustika v stavbah. Zvočna Acoustics in building. Sound
izolacija insulation
SIST EN ISO 10848-5:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10848-5:2020

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SIST EN ISO 10848-5:2020


EN ISO 10848-5
EUROPEAN STANDARD

NORME EUROPÉENNE

October 2020
EUROPÄISCHE NORM
ICS 91.120.20
English Version

Acoustics - Laboratory and field measurement of the
flanking transmission for airborne, impact and building
service equipment sound between adjoining rooms - Part
5: Radiation efficiencies of building elements (ISO 10848-
5:2020)
Acoustique - Mesurage en laboratoire et sur site des Akustik - Messung der Flankenübertragung von
transmissions latérales du bruit aérien, des bruits de Luftschall und Trittschall zwischen benachbarten
choc et du bruit d'équipement technique de bâtiment Räumen im Prüfstand - Teil 5: Strahlungswirksamkeit
entre des pièces adjacentes - Partie 5: Efficacité de von Bauelementen (ISO 10848-5:2020)
rayonnement des éléments de construction (ISO
10848-5:2020)
This European Standard was approved by CEN on 2 October 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 10848-5:2020 E
worldwide for CEN national Members.

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SIST EN ISO 10848-5:2020
EN ISO 10848-5:2020 (E)
Contents Page
European foreword . 3

2

---------------------- Page: 4 ----------------------
SIST EN ISO 10848-5:2020
EN ISO 10848-5:2020 (E)
European foreword
This document (EN ISO 10848-5:2020) 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 10848-5:2020 has been approved by CEN as EN ISO 10848-5:2020 without any
modification.

3

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SIST EN ISO 10848-5:2020

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SIST EN ISO 10848-5:2020
INTERNATIONAL ISO
STANDARD 10848-5
First edition
2020-08
Acoustics — Laboratory and field
measurement of the flanking
transmission for airborne, impact and
building service equipment sound
between adjoining rooms —
Part 5:
Radiation efficiencies of building
elements
Acoustique — Mesurage en laboratoire et sur site des transmissions
latérales du bruit aérien, des bruits de choc et du bruit d’équipement
technique de bâtiment entre des pièces adjacentes —
Partie 5: Efficacité de rayonnement des éléments de construction
Reference number
ISO 10848-5:2020(E)
©
ISO 2020

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SIST EN ISO 10848-5:2020
ISO 10848-5:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

---------------------- Page: 8 ----------------------
SIST EN ISO 10848-5:2020
ISO 10848-5:2020(E)

Contents  Page
Foreword .iv
Introduction .v
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Instrumentation . 4
5  Test arrangement . 4
6  Measurement methods . 4
6.1 General . 4
6.2 Measurement of L .
σ,a 5
6.2.1 Generation of sound field in the source room . 5
6.2.2 Measurement of the average sound pressure level in the receiving room . 5
6.2.3 Measurement of reverberation time of the room and evaluation of the
equivalent sound absorption area . 5
6.2.4 Measurement of the average velocity level of the element . 5
6.2.5 Calculation of the radiation index . 5
6.3 Measurement of L .
σ,s 5
6.3.1 Generation of vibration on the source element. 5
6.3.2 Procedure for Type A and Type B elements . 5
6.3.3 Measurement using stationary excitation . 6
6.3.4 Measurement using transient excitation . 6
6.3.5 Measurement of reverberation time and evaluation of the equivalent
sound absorption area . 6
6.3.6 Radiation index calculation . 6
7  Precision . 6
8  Expression of results . 6
9  Test report . 7
Annex A (informative) Measurement of radiation efficiency using sound intensity .8
Bibliography .10
© ISO 2020 – All rights reserved iii

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SIST EN ISO 10848-5:2020
ISO 10848-5:2020(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 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).
A list of all parts in the ISO 10848 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

---------------------- Page: 10 ----------------------
SIST EN ISO 10848-5:2020
ISO 10848-5:2020(E)

Introduction
ISO 10848 (all parts) specifies laboratory and field measurement methods to characterize the flanking
transmission of one or several building components.
This document describes the measurement of the radiation efficiency of an element using structure-
borne excitation and/or acoustical excitation. Both these radiation efficiencies are required to estimate
the sound reduction index due to resonant transmission only, according to ISO 12354-1:2017, Annex B.
For Type B elements as defined in ISO 10848-1 and ISO 12354-1, the radiation efficiency of an element
using structure-borne excitation is required to calculate flanking transmission. It is also required to
estimate adaptation terms used in predicting service equipment sound according to EN 12354-5.
© ISO 2020 – All rights reserved v

---------------------- Page: 11 ----------------------
SIST EN ISO 10848-5:2020

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SIST EN ISO 10848-5:2020
INTERNATIONAL STANDARD ISO 10848-5:2020(E)
Acoustics — Laboratory and field measurement of the
flanking transmission for airborne, impact and building
service equipment sound between adjoining rooms —
Part 5:
Radiation efficiencies of building elements
1  Scope
This document specifies measurement methods to characterize in the laboratory the acoustic radiation
of a building element when it is directly excited by an airborne or structure-borne source. It is applicable
to single-leaf and double-leaf elements (see ISO 12354-1:2017 Annex F, F2). The measured quantity
can be used as input data for prediction methods, such as ISO 12354-1 and ISO 12354-2, to compare
products, or to express a requirement.
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 10140-5, Acoustics — Laboratory measurement of sound insulation of building elements — Part 5:
Requirements for test facilities and equipment
ISO 10848-1:2017, Acoustics — Laboratory and field measurement of flanking transmission for airborne,
impact and building service equipment sound between adjoining rooms — Part 1: Frame document
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/
3.1
average velocity level
L
v
ten times the common logarithm
...

SLOVENSKI STANDARD
oSIST prEN ISO 10848-5:2019
01-december-2019
Akustika - Laboratorijsko in terensko merjenje bočnega prenosa zvoka v zraku,
udarnega zvoka in zvoka v gradbenih elementih servisne opreme med mejnimi
prostori - 5. del: Učinkovitost sevanja gradbenih elementov (ISO/DIS 10848-5:2019)
Acoustics - Laboratory and field measurement of the flanking transmission for airborne,
impact and building service equipment sound between adjoining rooms - Part 5:
Radiation efficiencies of building elements (ISO/DIS 10848-5:2019)
Akustik - Messung der Flankenübertragung von Luftschall und Trittschall zwischen
benachbarten Räumen im Prüfstand - Teil 5: Strahlungswirksamkeit von Bauelementen
(ISO/DIS 10848-5:2019)
Acoustique - Mesurage en laboratoire et sur site des transmissions latérales du bruit
aérien, des bruits de choc et du bruit d’équipement technique de bâtiment entre des
pièces adjacentes - Partie 5: Efficacité de rayonnement des éléments de construction
(ISO/DIS 10848-5:2019)
Ta slovenski standard je istoveten z: prEN ISO 10848-5
ICS:
17.140.01 Akustična merjenja in Acoustic measurements and
blaženje hrupa na splošno noise abatement in general
91.120.20 Akustika v stavbah. Zvočna Acoustics in building. Sound
izolacija insulation
oSIST prEN ISO 10848-5:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 10848-5:2019

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oSIST prEN ISO 10848-5:2019
DRAFT INTERNATIONAL STANDARD
ISO/DIS 10848-5
ISO/TC 43/SC 2 Secretariat: DIN
Voting begins on: Voting terminates on:
2019-10-15 2020-01-07
Acoustics — Laboratory and field measurement of the
flanking transmission for airborne, impact and building
service equipment sound between adjoining rooms —
Part 5:
Radiation efficiencies of building elements
ICS: 91.120.20
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 10848-5:2019(E)
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. ISO 2019

---------------------- Page: 3 ----------------------
oSIST prEN ISO 10848-5:2019
ISO/DIS 10848-5:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 10848-5:2019
ISO/DIS 10848-5:2019(E)

Contents  Page
Foreword .iv
Introduction .v
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Instrumentation . 4
5  Test arrangement . 5
6  Measurement methods . 5
6.1 General . 5
6.2 Measurement of L . 5
σ,a
6.2.1 Generation of sound field in the source room . 5
6.2.2 Measurement of the average sound pressure level in the receiving room . 5
6.2.3 Measurement of reverberation time of the room and evaluation of the
equivalent sound absorption area . 5
6.2.4 Measurement of the average velocity level of the element . 5
6.2.5 Calculation of the radiation index . 5
6.3 Measurement of L . 6
σ,s
6.3.1 Generation of vibration on the source element. 6
6.3.2 Procedure for Type A and B elements . 6
6.3.3 Measurement using stationary excitation . 6
6.3.4 Measurement using transient excitation . 6
6.3.5 Measurement of reverberation time and evaluation of the equivalent
sound absorption area . 6
6.3.6 Radiation index calculation . 6
7  Precision . 6
8  Expression of results . 7
9  Test report . 7
Annex A (informative) Measurement of radiation efficiency using sound intensity .8
Bibliography .10
© ISO 2019 – All rights reserved iii

---------------------- Page: 5 ----------------------
oSIST prEN ISO 10848-5:2019
ISO/DIS 10848-5:2019(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 ISO/TC 43, Subcommittee SC 2, Building Acoustics.
A list of all parts in the ISO 10848 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 2019 – All rights reserved

---------------------- Page: 6 ----------------------
oSIST prEN ISO 10848-5:2019
ISO/DIS 10848-5:2019(E)

Introduction
This document describes the measurement of the radiation efficiency of an element using structure-
borne and/or acoustical excitation. Both these radiation efficiencies are required to estimate the sound
reduction index due to resonant transmission only, according to ISO 12354-1:2017, Annex B.
For Type B elements as defined in ISO 10848-1:2017 and ISO 12354-1:2017, the radiation efficiency
of an element using structure-borne excitation is required to calculate flanking transmission. It is
also required to estimate adaptation terms used in predicting service equipment sound according to
ISO 12354-5:2009.
© ISO 2019 – All rights reserved v

---------------------- Page: 7 ----------------------
oSIST prEN ISO 10848-5:2019

---------------------- Page: 8 ----------------------
oSIST prEN ISO 10848-5:2019
DRAFT INTERNATIONAL STANDARD ISO/DIS 10848-5:2019(E)
Acoustics — Laboratory and field measurement of the
flanking transmission for airborne, impact and building
service equipment sound between adjoining rooms —
Part 5:
Radiation efficiencies of building elements
1  Scope
ISO 10848 (all parts) specifies laboratory and field measurement methods to characterize the flanking
transmission of one or several building components.
This part of ISO 10848 specifies measurement methods to be performed in the laboratory to characterize
the acoustic radiation of a building element when it is directly excited by an airborne or structure-
borne source. It is applicable to single-leaf and double-leaf elements (see ISO 12354-1:2017 Annex F,
F2). The measured quantity can be used as input data for prediction methods, such as ISO 12354-1 and
ISO 12354-2, to compare products, or to express a requirement.
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 10140-5, Acoustics — Laboratory measurement of sound insulation of building elements — Part 5:
Requirements for test facilities and equipment
ISO 10848-1:2017, Acoustics — Laboratory and field measurement of flanking transmission for airborne,
impact and building service equipment sound between adjoining rooms — Part 1: Frame document
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/
3.1
average velocity level
L
v
© ISO 2019 – All rights reserved 1

---------------------- Page: 9 ----------------------
oSIST prEN ISO 10848-5:2019
ISO/DIS 10848-5:2019(E)

ten times the common logarithm of the ratio of the time and space averaged mean-square normal
velocity of an element to the squared reference velocity according to equation (1)
T
1
 m 
2
vttd
()
 ∫ 
0
T
m
 
L =10lg (1)
v
2
 
v
0
 
 
where
–9
v is the reference velocity, in metres per second; v = 1 × 10 m/s
0 0
T is the integration time, in seconds.
m
Note 1 to entry: This quantity is expressed in decibels.
-8
Note 2 to entry: When considering sound radiation, using 5 × 10 m/s as a reference velocity leads to simpler
-9
equations; however, 10 m/s is the reference used in ISO 10848-1; hence this reference has also been used in this
document. As a result, 34 dB has been added in equation (11), (12) and (A.3).
Note 3 to entry: If stationary airborne or structure-borne excitation is used, the spatial averaging is calculated
according to equation (2)
2 22
vv+++v 
1 2 n
L =10lg (2)
 
v
 2 
nv⋅
 
0
where
v , v , v are root mean square (rms) velocities at n different positions on the element, in metres
1 2 n
per second.
3.2
average sound pressure level in a room
L
p
ten times the common logarithm of the ratio of the space and time average of the sound pressure
squared to the square of the reference sound pressure, the space average being taken over the entire
room with the exception of those parts where the direct radiation of a sound source or the near fi
...