Acoustics - Laboratory and field measurement of flanking transmission for airborne, impact and building service equipment sound between adjoining rooms - Part 1: Frame document (ISO 10848-1:2017)

ISO 10848 (all parts) specifies measurement methods to characterize the flanking transmission of one or several building components. These measurements are performed in a laboratory test facility or in the field.
The performance of the building components is expressed either as an overall quantity for the combination of elements and junction (such as the normalized flanking level difference and/or normalized flanking impact sound pressure level) or as the vibration reduction index of a junction or the normalized direction-average vibration level difference of a junction.
Two approaches are used for structure-borne sound sources in buildings, a normalized flanking equipment sound pressure level and a transmission function that can be used to estimate sound pressure levels in a receiving room due to structure-borne excitation by service equipment in a source room. The former approach assumes that flanking transmission is limited to one junction (or no junction if the element supporting the equipment is the separating element), and the latter considers the combination of direct (if any) and all flanking transmission paths.
ISO 10848-1:2017 contains definitions, general requirements for test elements and test rooms, and measurement methods. Guidelines are given for the selection of the quantity to be measured, depending on the junction and the types of building elements involved. Other parts of ISO 10848 specify the application for different types of junction and building elements.
The quantities characterizing the flanking transmission can be used to compare different products, or to express a requirement, or as input data for prediction methods, such as ISO 12354‑1 and ISO 12354‑2.

Akustik - Messung der Flankenübertragung von Luftschall, Trittschall und Schall von Gebäudetechnischen Anlagen zwischen benachbarten Räumen im Prüfstand und am Bau - Teil 1: Rahmendokument (ISO 10848-1:2017)

ISO 10848 (alle Teile) legt Messverfahren zur Bestimmung der Flankenübertragung eines oder mehrerer Bauteile fest, die in Prüfständen oder am Bau durchzuführen sind. Diese Messungen werden in einer Labortestanlage oder im Feld durchgeführt.
Die Gebrauchstauglichkeit der Bauteile wird entweder als Gesamtgröße für die Kombination von Bauteilen und Stoßstellen (wie der Norm-Flankenschallpegeldifferenz und/oder dem Norm-Flankentrittschallpegel) oder als Stoßstellendämm-Maß einer Stoßstelle oder als richtungsgemittelte Norm-Schwingungspegel-differenz einer Stoßstelle angegeben.
Für Körperschallquellen in Gebäuden werden zwei Ansätze verwendet: Ein Norm-Flankengeräteschallpegel und eine Übertragungsfunktion, mit der Schalldruckpegel in einem Empfangsraum, welche durch Körperschallanregung durch technische Anlagen in einem Senderaum erzeugt werden, näherungsweise bestimmt werden können. Der erste Ansatz setzt voraus, dass die Flankenübertragung auf eine Stoßstelle begrenzt ist (oder keine Stoßstelle vorhanden ist, wenn es sich beim das Gerät tragenden Bauteil um das trennende Bauteil handelt), während beim zweiten Ansatz die Kombination des direkten Übertragungswegs (sofern vorhanden) und aller Flankenübertragungswege berücksichtigt wird.
Dieses Dokument enthält Begriffe, allgemeine Anforderungen an zu prüfende Bauteile und Prüfräume sowie Messverfahren. Es werden Anleitungen für die Wahl der zu messenden Größe in Abhängigkeit von der Stoßstelle und den Arten der beteiligten Bauteile gegeben. Andere Teile der ISO 10848 legen die Anwendung für verschiedene Stoßstellenarten und Bauteile fest.
Die die Flankenübertragung charakterisierenden Größen können für den Vergleich unterschiedlicher Produkte oder für die Formulierung einer Anforderung oder als Eingangsdaten für Vorhersageverfahren, wie z. B. ISO 12354-1 und ISO 12354-2, herangezogen werden.

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 1: Document cadre (ISO 10848-1:2017)

L'ISO 10848 (toutes les parties) spécifie les méthodes de mesure pour la caractérisation des transmissions latérales d'un ou de plusieurs éléments de construction. Ces mesurages sont effectués en laboratoire d'essai ou sur site.
Les performances des éléments de construction sont exprimées en tant que grandeur globale pour la combinaison des éléments et de la jonction (telle que l'isolement latéral normalisé et/ou le niveau de bruit de choc latéral normalisé) ou en tant qu'indice d'affaiblissement vibratoire d'une jonction ou d'isolement vibratoire bidirectionnel normalisé d'une jonction.
Deux grandeurs sont utilisées pour les sources solidiennes dans les bâtiments, un niveau de bruit d'équipement latéral normalisé et une fonction de transmission qui peut être utilisée pour estimer les niveaux de pression acoustique dans une salle de réception dus à l'excitation solidienne par un équipement technique dans une salle d'émission. La première méthode suppose que les transmissions latérales sont limitées à une jonction (ou aucune jonction si l'élément supportant l'équipement est l'élément de séparation), et la seconde considère la combinaison du chemin de transmission direct (le cas échéant) et de tous les chemins de transmission latéraux.
ISO 10848-1:2017 comprend les définitions, les exigences générales relatives aux éléments et aux salles d'essai, ainsi que les méthodes de mesure. Des lignes directrices sont données pour la sélection de la grandeur à mesurer, en fonction de la jonction et des types d'éléments de construction impliqués. Les autres parties de l'ISO 10848 spécifient l'application aux différents types d'éléments de jonction et de construction.
Les grandeurs caractérisant la transmission latérale peuvent être utilisées pour comparer différents produits, pour exprimer une exigence ou comme données d'entrée des méthodes de prévision telles que l'ISO 12354‑1 et l'ISO 12354‑2.

Akustika - Laboratorijsko in terensko merjenje bočnega prenosa zvoka v zraku, udarnega zvoka in zvoka v gradbenih elementih servisne opreme med mejnimi prostori - 1. del: Okvirni dokument (ISO 10848-1:2017)

ISO 10848 (vsi deli) določa merilne metode za opredelitev bočnega prenosa pri enem ali več sestavnih delih stavb. Te meritve se izvajajo v preskusnih laboratorijih ali na terenu.
Učinkovitost sestavnih delov stavb je izražena kot skupna količina za kombinacijo elementov in spoja (na primer normirana razlika v ravni zvoka pri bočnem prenosu zvoka in/ali normirana raven tlaka udarnega zvoka pri bočnem prenosu) oziroma kot faktor dušenja vibracij spoja ali normirana smerno povprečna razlika v ravni vibracij spoja.
Za vire strukturnega zvoka v stavbah se uporabljata dva pristopa: normirani zvočni tlak opreme pri bočnem prenosu in funkcija prenosa, ki se lahko uporablja za ocenjevanje ravni zvočnega tlaka v sprejemnem prostoru zaradi strukturnega vzbujanja, ki ga povzroča servisna oprema v prostoru
z virom. Prvi pristop predpostavlja, da je bočni prenos omejen na en spoj (ali ni omejen na nobenega, če je element, ki podpira opremo, ločevalni element), drugi pa upošteva kombinacijo neposredne prenosne poti (če ta obstaja) in bočnih prenosnih poti.
Ta dokument vsebuje definicije, splošne zahteve za preskusne elemente in preskusne prostore ter merilne metode. Podaja smernice za izbiro merjene količine glede na spoj in vrsto stavbnih elementov. Drugi deli standarda ISO 10848 opredeljujejo uporabo različnih vrst spojev in stavbnih elementov.
Količine, ki opisujejo bočni prenos, se lahko uporabijo za primerjavo različnih izdelkov,
za izražanje zahteve ali kot vhodni podatki za metode napovedovanja (npr. ISO 12354-1 in ISO 12354-2).

General Information

Status
Published
Publication Date
24-Oct-2017
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
25-Oct-2017
Completion Date
25-Oct-2017

RELATIONS

Buy Standard

Standard
EN ISO 10848-1:2018
English language
43 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 10848-1:2018
01-marec-2018
1DGRPHãþD
SIST EN ISO 10848-1:2006
$NXVWLND/DERUDWRULMVNRLQWHUHQVNRPHUMHQMHERþQHJDSUHQRVD]YRNDY]UDNX
XGDUQHJD]YRNDLQ]YRNDYJUDGEHQLKHOHPHQWLKVHUYLVQHRSUHPHPHGPHMQLPL
SURVWRULGHO2NYLUQLGRNXPHQW ,62

Acoustics - Laboratory and field measurement of flanking transmission for airborne,

impact and building service equipment sound between adjoining rooms - Part 1: Frame

document (ISO 10848-1:2017)

Akustik - Messung der Flankenübertragung von Luftschall, Trittschall und Schall von

Gebäudetechnischen Anlagen zwischen benachbarten Räumen im Prüfstand und am
Bau - Teil 1: Rahmendokument (ISO 10848-1:2017)

Acoustique - Mesurage en laboratoire des transmissions latérales du bruit aérien et des

bruits de choc entre des pièces adjacentes - Partie 1: Document cadre (ISO 10848-

1:2017)
Ta slovenski standard je istoveten z: EN ISO 10848-1:2017
ICS:
17.140.01 $NXVWLþQDPHUMHQMDLQ Acoustic measurements and
EODåHQMHKUXSDQDVSORãQR noise abatement in general
91.120.20 $NXVWLNDYVWDYEDK=YRþQD Acoustics in building. Sound
L]RODFLMD insulation
SIST EN ISO 10848-1:2018 en

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

---------------------- Page: 1 ----------------------
SIST EN ISO 10848-1:2018
---------------------- Page: 2 ----------------------
SIST EN ISO 10848-1:2018
EN ISO 10848-1
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2017
EUROPÄISCHE NORM
ICS 91.120.20 Supersedes EN ISO 10848-1:2006
English Version
Acoustics - Laboratory and field measurement of flanking
transmission for airborne, impact and building service
equipment sound between adjoining rooms - Part 1:
Frame document (ISO 10848-1:2017)

Acoustique - Mesurage en laboratoire et sur site des Akustik - Messung der Flankenübertragung von

transmissions latérales du bruit aérien, des bruits de Luftschall, Trittschall und Schall von

choc et du bruit d'équipement technique de bâtiment Gebäudetechnischen Anlagen zwischen benachbarten

entre des pièces adjacentes - Partie 1: Document cadre Räumen im Prüfstand und am Bau - Teil 1:

(ISO 10848-1:2017) Rahmendokument (ISO 10848-1:2017)
This European Standard was approved by CEN on 26 August 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10848-1:2017 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 10848-1:2018
EN ISO 10848-1:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 10848-1:2018
EN ISO 10848-1:2017 (E)
European foreword

This document (EN ISO 10848-1:2017) 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 2018 and conflicting national standards shall be

withdrawn at the latest by April 2018.

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 10848-1:2006.

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, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 10848-1:2017 has been approved by CEN as EN ISO 10848-1:2017 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 10848-1:2018
---------------------- Page: 6 ----------------------
SIST EN ISO 10848-1:2018
INTERNATIONAL ISO
STANDARD 10848-1
Second edition
2017-09
Acoustics — Laboratory and field
measurement of flanking transmission
for airborne, impact and building
service equipment sound between
adjoining rooms —
Part 1:
Frame document
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 1: Document cadre
Reference number
ISO 10848-1:2017(E)
ISO 2017
---------------------- Page: 7 ----------------------
SIST EN ISO 10848-1:2018
ISO 10848-1:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 10848-1:2018
ISO 10848-1:2017(E)
Contents  Page

Foreword ..........................................................................................................................................................................................................................................v

1  Scope ................................................................................................................................................................................................................................. 1

2  Normative references ...................................................................................................................................................................................... 1

3  Terms and definitions ..................................................................................................................................................................................... 2

4  Quantities to characterize flanking transmission ............................................................................................................. 7

4.1 General ........................................................................................................................................................................................................... 7

4.2 Normalized flanking level difference, D , normalized flanking impact sound
n,f

pressure level, L ,and normalized flanking equipment sound pressure level, L ................

n,f ne0,f 8

4.2.1 General...................................................................................................................................................................................... 8

4.2.2 D estimated from measurements of D ..............................................................................................

v,ij,n n,f 8

4.3 Vibration reduction index, K ......................................................................................................................................................

ij 8

4.3.1 General...................................................................................................................................................................................... 8

4.3.2 K for combinations of Type A and B elements ..................................................................................... 9

4.3.3 Strong coupling between Type A elements............................................................................................... 9

4.4 Normalized direction-average vibration level difference, D ...............................................

v,ij,n

4.4.1 General...................................................................................................................................................................................... 9

4.5 Selection of the measurement method ...........................................................................................................................10

5  Instrumentation .................................................................................................................................................................................................10

5.1 General ........................................................................................................................................................................................................10

5.2 Verification ..............................................................................................................................................................................................11

6  General requirements for test facility and test elements .......................................................................................11

6.1 Laboratory ...............................................................................................................................................................................................11

6.2 Field ...............................................................................................................................................................................................................14

7  Measurement methods ...............................................................................................................................................................................14

7.1 Measurement of D , L and L .....................................................................................................................................

n,f n,f ne0,f 14

7.1.1 Generation of sound field in the source room .....................................................................................14

7.1.2 Measurement of the average sound pressure level .........................................................................16

7.1.3 Measurement of reverberation time and evaluation of the equivalent

sound absorption area .............................................................................................................................................18

7.2 Measurement of K and D .................................................................................................................................

v,ij,n

7.2.1 General aspects for K ................................................................................................................................................

ij 18

7.2.2 General aspects for D ......................................................................................................................

v,ij,n

7.2.3 Vibration measurement ..........................................................................................................................................19

7.2.4 Generation of vibration on the source element..................................................................................20

7.2.5 Procedure for Type A and B elements ........................................................................................................20

7.2.6 Steady-state excitation .............................................................................................................................................21

7.2.7 Transient excitation....................................................................................................................................................22

7.3 Measurement of the structural reverberation time for Type A elements .........................................22

7.3.1 General...................................................................................................................................................................................22

7.3.2 Excitation of the test element ............................................................................................................................22

7.3.3 Measurement and excitation positions .....................................................................................................23

7.3.4 Evaluation of the decay curves .........................................................................................................................23

7.3.5 Lower limits for reliable results caused by filter and detector .............................................24

7.4 Frequency range of measurement ......................................................................................................................................24

8  Influences from other parts of the test facility or the building construction in the

field situation ........................................................................................................................................................................................................24

8.1 Laboratory installations of test junctions .....................................................................................................................24

© ISO 2017 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 10848-1:2018
ISO 10848-1:2017(E)

8.2 Criterion to assess flanking transmission for junctions comprised of Type A elements .....25

8.2.1 General...................................................................................................................................................................................25

8.2.2 Practical considerations .........................................................................................................................................25

8.3 Verification procedure for a Type B flanking element that is structurally

independent of a separating element ...............................................................................................................................25

9  Shielding.....................................................................................................................................................................................................................26

10  Expression of results .....................................................................................................................................................................................26

Annex A (normative) Assessing the decrease in vibration level with distance ....................................................28

Annex B (normative) Calibrated structure-borne sound source .........................................................................................30

Bibliography .............................................................................................................................................................................................................................34

iv © ISO 2017 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 10848-1:2018
ISO 10848-1:2017(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 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 ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics.

This second edition cancels and replaces the first edition (ISO 10848-1:2006), which has been

technically revised with the following changes:
a) extension to field measurements;
b) extension to building service equipment;

c) normalized direction-averaged vibration level difference for junctions between lightweight

elements has been introduced;

d) an assessment method for the decrease in vibration level with distance has been introduced;

e) transmission function measurements with a calibrated structure-borne sound source has been

introduced;

f) definitions of element types A and B to avoid issues with the terms “heavy” and “light” have

been added.
A list of all the parts in the ISO 10848 series can be found on the ISO website.
© ISO 2017 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 10848-1:2018
---------------------- Page: 12 ----------------------
SIST EN ISO 10848-1:2018
INTERNATIONAL STANDARD ISO 10848-1:2017(E)
Acoustics — Laboratory and field measurement of flanking
transmission for airborne, impact and building service
equipment sound between adjoining rooms —
Part 1:
Frame document
1  Scope

ISO 10848 (all parts) specifies measurement methods to characterize the flanking transmission of one

or several building components. These measurements are performed in a laboratory test facility or in

the field.

The performance of the building components is expressed either as an overall quantity for the

combination of elements and junction (such as the normalized flanking level difference and/or

normalized flanking impact sound pressure level) or as the vibration reduction index of a junction or

the normalized direction-average vibration level difference of a junction.

Two approaches are used for structure-borne sound sources in buildings, a normalized flanking

equipment sound pressure level and a transmission function that can be used to estimate sound

pressure levels in a receiving room due to structure-borne excitation by service equipment in a source

room. The former approach assumes that flanking transmission is limited to one junction (or no

junction if the element supporting the equipment is the separating element), and the latter considers

the combination of direct (if any) and all flanking transmission paths.

This document contains definitions, general requirements for test elements and test rooms, and

measurement methods. Guidelines are given for the selection of the quantity to be measured, depending

on the junction and the types of building elements involved. Other parts of ISO 10848 specify the

application for different types of junction and building elements.

The quantities characterizing the flanking transmission can be used to compare different products, or

to express a requirement, or as input data for prediction methods, such as ISO 12354-1 and ISO 12354-2.

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 717-2, Acoustics — Rating of sound insulation in buildings and of building elements — Part 2: Impact

sound insulation

ISO 3382-2, Acoustics — Measurement of room acoustic parameters — Part 2: Reverberation time in

ordinary rooms

ISO 7626-1, Mechanical vibration and shock — Experimental determination of mechanical mobility —

Part 1: Basic terms and definitions, and transducer specifications

ISO 7626-5, Vibration and shock — Experimental determination of mechanical mobility — Part 5:

Measurements using impact excitation with an exciter which is not attached to the structure

© ISO 2017 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 10848-1:2018
ISO 10848-1:2017(E)

ISO 10140-4:2010, Acoustics — Laboratory measurement of sound insulation of building elements —

Part 4: Measurement procedures and requirements

ISO 10140-5:2010, Acoustics — Laboratory measurement of sound insulation of building elements —

Part 5: Requirements for test facilities and equipment

IEC 61183, Electroacoustics—Random-incidence and diffuse-field calibration of sound level meters

IEC 61260 (all parts), Electroacoustics — Octave-band and fractional-octave-band filters

IEC 61672-1, Electroacoustics — Sound level meters elements — Part 1: Specifications

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:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
average sound pressure level in a room

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 field of

the boundaries (walls, etc.) is of significant influence
Note 1 to entry: This quantity is expressed in decibels.

Note 2 to entry: If a continuously moving microphone is used, L is determined as follows:

 m 
pt dt
 
 
L =10lg
 
 
 
3.2
normalized flanking level difference
n,f

difference in the space and time averaged sound pressure level produced in two rooms by one or more

sound sources in one of them, when the transmission only occurs through a specified flanking path and

the result is normalized to an equivalent sound absorption area in the receiving room as follows:

DL=−L −10lg
n,f 12
where
L is the average sound pressure level in the source room, in dB;
L is the average sound pressure level in the receiving room, in dB;
A is the equivalent sound absorption area in the receiving room, in m ;
2 2
A is the reference equivalent sound absorption area, in m ; A = 10 m
0 0
Note 1 to entry: This quantity is expressed in decibels.
2 © ISO 2017 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 10848-1:2018
ISO 10848-1:2017(E)

Note 2 to entry: For clarity, the term D is used when only one flanking path determines the sound transmission

n,f

(such as with suspended ceilings) and the term D is used when only one specified transmission path ij out

n,f,ij

of several paths is considered (such as with structure-borne sound transmission on junctions of three or four

connected elements).
3.3
normalized flanking impact sound pressure level
n,f

space and time averaged sound pressure level in the receiving room produced by a tapping machine

operating at different positions on a tested element (floor) in the source room, when the transmission

only occurs through a specified flanking path and the result is normalized to an equivalent sound

absorption area, in the receiving room and is expressed as follows:
LL=+10lg
n,f 2
where
L is the average sound pressure level in the receiving room, in dB;
A is the equivalent sound absorption area in the receiving room, in m ;
2 2
A is the reference equivalent sound absorption area, in m ; A = 10 m
0 0
Note 1 to entry: This quantity is expressed in decibels.

Note 2 to entry: For clarity, the term L is used when only one flanking path determines the sound transmission

n,f

(such as with access floors) and the term L is used when only one specified transmission path ij out of several

n,f,ij

paths is considered (such as with structure-borne sound transmission on junctions of three or four connected

elements).
3.4
normalized flanking equipment sound pressure level
ne0,f

space and time averaged sound pressure level in the receiving room produced by a structure-borne

sound source injecting a unit power (1 W) at different positions on a tested element in the source room,

when the transmission only occurs through a specified flanking path and the result is normalized to an

equivalent sound absorption area in the receiving room and is expressed as follows:

LL=+10lg
ne0,fe2
where

L is the average sound pressure level in the receiving room with a structure-borne sound source

injecting 1 W into the tested element, in dB;
A is the equivalent sound absorption area in the receiving room, in m ;
2 2
A is the reference equivalent sound absorption area, in m ; A = 10 m
0 0
Note 1 to entry: This quantity is expressed in decibels.

Note 2 to entry: For clarity, the term L is used when only one flanking path determines the sound

ne0,f

transmission (such as with equipment installed on access floors or light façades) and the term L is used

ne0,f,ij

when only one specified transmission path ij out of several paths is considered (such as with structure-borne

sound transmission on junctions of three or four connected elements).

Note 3 to entry: The sound pressure level generated by any equipment, L , can be approximated when the

ne,f,equip

equipment has been characterized using EN 15657 and its averaged installed power L has been determined

W,equip

from the spatial average single equivalent mobility of the supporting element as described in EN 15657:2009, C.3

and using EN 15657 to give the installed power from the equipment and receiver characteristics.

© ISO 2017 – All rights reserved 3
---------------------- Page: 15 ----------------------
SIST EN ISO 10848-1:2018
ISO 10848-1:2017(E)
3.5
transmission function for excitation position k
TF,k

difference between the space and time averaged sound pressure level in the receiving room and the

structure-borne sound power level for a source at excitation position k on the source element as follows:

DL=−L
TF,akkv, W,k
where

L is the average sound pressure level in the receiving room, in dB, referenced to 2 × 10 Pa;

av,k
−12
L is the structure-borne sound power level, in dB, referenced to 10 W.
W,k
Note 1 to entry: This quantity is expressed in decibels.
[25]

Note 2 to entry: The transmission function is specific to the building in which it is measured and quantifies

the combination of all the transmission paths from the power injected at a source position on an element to a

spatial average sound pressure level in a receiving room in a building. In some cases, the transmission function

will only correspond to the combination of all the flanking paths, but in some situations, it will be a combination

of the direct transmission path and all the flanking paths. The building could either be a laboratory set-up (such

as a flanking laboratory with wall and/or floor junctions) or an actual building.

3.6
spatial average transmission fu
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.