SIST EN ISO 717-2:2021

Acoustics - Rating of sound insulation in buildings and of building elements - Part 2: Impact sound insulation (ISO 717-2:2020)

This document
a) defines single-number quantities for impact sound insulation in buildings and of floors,
b) gives rules for determining these quantities from the results of measurements carried out in
one-third-octave bands in accordance with ISO 10140-3 and ISO 16283-2, and in octave bands in
accordance with that option in ISO 16283-2 for field measurements only,
c) defines single-number quantities for the impact sound reduction of floor coverings and floating
floors calculated from the results of measurements carried out in accordance with ISO 10140-3, and
d) specifies a procedure for evaluating the weighted reduction in impact sound pressure level by floor
coverings on lightweight floors.
The single-number quantities in accordance with this document are intended for rating impact
sound insulation and for simplifying the formulation of acoustical requirements in building codes. An
additional single-number evaluation in steps of 0,1 dB is indicated where it is needed for the expression
of uncertainty (except for spectrum adaptation terms). Numerical values of the single-number
quantities are specified where required for calculations.
The rating of measurements over an enlarged frequency range is given in Annex A.
A method for obtaining single-number quantities for bare heavy floors according to their performance
in combination with floor coverings is given in Annex B.
Example calculations of single-number quantities are given in Annex C.
The rating of measurements with a heavy and soft impact source (rubber ball) is given in Annex D.

Akustik - Bewertung der Schalldämmung in Gebäuden und von Bauteilen - Teil 2: Trittschalldämmung (ISO 717-2:2020)

Dieses Dokument
a) legt Einzahlangaben für die Trittschalldämmung in Gebäuden und von Decken fest,
b) enthält Regeln für die Ermittlung dieser Einzahlangaben aus den Ergebnissen von Messungen in Terzbändern nach ISO 10140 3 und ISO 16283 2 und in Oktavbändern entsprechend der zutreffenden Option in ISO 16283 2 ausschließlich für Messungen in Gebäuden,
c) legt Einzahlangaben für die Trittschallminderung durch Deckenauflagen und schwimmende Estriche fest, die aus den Ergebnissen von Messungen nach ISO 10140 3 berechnet wurden, und
d) legt ein Verfahren zur Ermittlung der bewerteten Trittschallpegelminderung durch Deckenauflagen auf leichten Decken fest.
Die Einzahlangaben nach diesem Dokument sind für die Bewertung der Trittschalldämmung und für die Vereinfachung der Formulierung von akustischen Anforderungen in Bauvorschriften vorgesehen. Wenn erforderlich, ist zum Zwecke der Angabe der Unsicherheit die Ermittlung einer zusätzlichen Einzahlangabe in 0,1 dB-Schritten enthalten (ausgenommen sind die Spektrum-Anpassungswerte). Wenn für Berechnungen erforderlich, werden numerische Werte der Einzahlangaben für verschiedene Bedürfnisse festgelegt.
Die Bewertung der Messungen über einen erweiterten Frequenzbereich wird in Anhang A angegeben.
Ein Verfahren zur Bestimmung von Einzahlangaben für massive Rohdecken entsprechend ihrer Leistung in Kombination mit Deckenauflagen wird in Anhang B angegeben.
Beispielberechnungen von Einzahlangaben werden in Anhang C angegeben.
Die Bewertung der Messungen mit einer schweren und weichen Trittschallquelle (Gummiball) ist in Anhang D angegeben.

Acoustique - Évaluation de l'isolement acoustique des immeubles et des éléments de construction - Partie 2: Protection contre le bruit de choc (ISO 717-2:2020)

Le présent document:
a)    définit des valeurs uniques de l'isolement acoustique des immeubles et des planchers au bruit de choc;
b)    spécifie des règles de détermination de ces valeurs d'après les résultats de mesures effectuées dans des bandes de fréquences de tiers d'octave conformément à l'ISO 10140-3 et à l'ISO 16283-2, et dans des bandes de fréquences d'octave conformément à l'ISO 16283-2 pour des mesures sur site seulement;
c)    définit des valeurs uniques de la réduction du bruit de choc par les revêtements de sol et les planchers flottants calculées d'après les résultats de mesures effectuées conformément à l'ISO 10140-3;
d)    spécifie un mode opératoire d'évaluation de la réduction du niveau du bruit de choc pondéré par les revêtements de sol sur des planchers légers.
Les valeurs uniques spécifiées dans le présent document sont destinées à indiquer la qualité de l'isolement acoustique aux bruits de choc et à faciliter l'énoncé des exigences en matière d'acoustique dans les règles techniques de la construction. Une évaluation unique complémentaire par pas de 0,1 dB est indiquée lorsque cela est nécessaire pour exprimer l'incertitude (sauf pour les termes d'adaptation à un spectre). Les valeurs numériques de ces valeurs uniques sont spécifiées lorsque cela est nécessaire pour les calculs.
L'évaluation des mesures sur une gamme étendue de fréquences est traitée à l'Annexe A.
Un procédé d'obtention des valeurs uniques pour les planchers nus lourds, selon leur performance acoustique lorsqu'ils sont revêtus de revêtement de sol, figure à l'Annexe B.
Des exemples de calcul de valeurs uniques figurent à l'Annexe C.
L'évaluation des mesures avec une source de choc lourd et mou (balle en caoutchouc) est traitée à l'Annexe D.

Akustika - Vrednotenje zvočne izolirnosti v stavbah in zvočne izolirnosti gradbenih elementov - 2. del: Izolirnost pred udarnim zvokom (ISO 717-2:2020)

General Information

• Status: Published
• Public Enquiry End Date: 09-Mar-2020
• Publication Date: 26-Jan-2021
• ICS: 91.120.20 - Acoustics in building. Sound insulation
• Technical Committee: AKU - Acoustics
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 07-Jan-2021
• Due Date: 14-Mar-2021
• Completion Date: 27-Jan-2021
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Mandate: M/100 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on precast concrete products
• Ref Project: EN ISO 717-2:2020 - Acoustics - Rating of sound insulation in buildings and of building elements - Part 2: Impact sound insulation (ISO 717-2:2020)

Relations

• Replaces: SIST EN ISO 717-2:2013 - Acoustics - Rating of sound insulation in buildings and of building elements - Part 2: Impact sound insulation (ISO 717-2:2013)
• Effective Date: 01-Mar-2021
• Replaces: SIST EN ISO 717-2:2013 - Acoustics - Rating of sound insulation in buildings and of building elements - Part 2: Impact sound insulation (ISO 717-2:2013)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 717-2:2021
01-marec-2021
Nadomešča:
SIST EN ISO 717-2:2013
Akustika - Vrednotenje zvočne izolirnosti v stavbah in zvočne izolirnosti gradbenih
elementov - 2. del: Izolirnost pred udarnim zvokom (ISO 717-2:2020)
Acoustics - Rating of sound insulation in buildings and of building elements - Part 2:
Impact sound insulation (ISO 717-2:2020)
Akustik - Bewertung der Schalldämmung in Gebäuden und von Bauteilen - Teil 2:
Trittschalldämmung (ISO 717-2:2020)
Acoustique - Évaluation de l'isolement acoustique des immeubles et des éléments de
construction - Partie 2: Protection contre le bruit de choc (ISO 717-2:2020)
Ta slovenski standard je istoveten z: EN ISO 717-2:2020
ICS:
91.120.20 Akustika v stavbah. Zvočna Acoustics in building. Sound
izolacija insulation
SIST EN ISO 717-2:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 717-2:2021

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SIST EN ISO 717-2:2021


EN ISO 717-2
EUROPEAN STANDARD

NORME EUROPÉENNE

December 2020
EUROPÄISCHE NORM
ICS 91.120.20 Supersedes EN ISO 717-2:2013
English Version

Acoustics - Rating of sound insulation in buildings and of
building elements - Part 2: Impact sound insulation (ISO
717-2:2020)
Acoustique - Évaluation de l'isolement acoustique des Akustik - Bewertung der Schalldämmung in Gebäuden
immeubles et des éléments de construction - Partie 2: und von Bauteilen - Teil 2: Trittschalldämmung (ISO
Protection contre le bruit de choc (ISO 717-2:2020) 717-2:2020)
This European Standard was approved by CEN on 12 December 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 717-2:2020 E
worldwide for CEN national Members.

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SIST EN ISO 717-2:2021
EN ISO 717-2:2020 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 717-2:2021
EN ISO 717-2:2020 (E)
European foreword
This document (EN ISO 717-2:2020) 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 June 2021, and conflicting national standards shall be
withdrawn at the latest by June 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 717-2:2013.
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 717-2:2020 has been approved by CEN as EN ISO 717-2:2020 without any modification.

3

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SIST EN ISO 717-2:2021

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SIST EN ISO 717-2:2021
INTERNATIONAL ISO
STANDARD 717-2
Fourth edition
2020-12
Acoustics — Rating of sound
insulation in buildings and of building
elements —
Part 2:
Impact sound insulation
Acoustique — Évaluation de l'isolement acoustique des immeubles et
des éléments de construction —
Partie 2: Protection contre le bruit de choc
Reference number
ISO 717-2:2020(E)
©
ISO 2020

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SIST EN ISO 717-2:2021
ISO 717-2:2020(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

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SIST EN ISO 717-2:2021
ISO 717-2:2020(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Procedure for evaluating single-number quantities for impact sound insulation rating .3
4.1 General . 3
4.2 Reference values . 4
4.3 Method of comparison . 4
4.3.1 Measurements in one-third-octave bands . 4
4.3.2 Measurements in octave bands . 5
4.4 Statement of results . 5
4.5 Impact sound insulation measured with heavy and soft impact sources . 6
5 Procedure for evaluating the weighted reduction in impact sound pressure level by
floor coverings on bare heavy floors . 7
5.1 General . 7
5.2 Reference floor . 7
5.3 Calculation . 8
5.4 Statement of results . 9
6 Procedure for evaluating the weighted reduction in impact sound pressure level by
floor coverings on lightweight floors . 9
6.1 General . 9
6.2 Reference curves for the reference lightweight floors used to calculate ΔL .
t,w 9
6.3 Calculation .10
6.4 Statement of results .10
Annex A (informative) Additional weighting procedure .11
Annex B (informative) Procedure for evaluating the equivalent weighted normalized
impact sound pressure level of bare heavy floors .14
Annex C (informative) Examples of the evaluation of a single-number quantity .16
Annex D (normative) Rating method for impact sound insulation measured with a heavy
and soft impact source .20
Bibliography .23
© ISO 2020 – All rights reserved iii

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SIST EN ISO 717-2:2021
ISO 717-2:2020(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, 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 fourth edition cancels and replaces the third edition (ISO 717-2:2013), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— A new Annex D with a method for rating heavy/soft impact sound insulation using an A-weighted
maximum impact sound pressure level.
A list of all parts in the ISO 717 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

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SIST EN ISO 717-2:2021
ISO 717-2:2020(E)

Introduction
Methods of measurement of impact sound insulation in buildings and of building elements have
been standardized in ISO 10140-3 and ISO 16283-2. These methods give values for the impact sound
insulation which are frequency dependent. The purpose of this document is to standardize a method
whereby the frequency-dependent values of impact sound insulation can be converted into a single
number characterizing the acoustical performance.
© ISO 2020 – All rights reserved v

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SIST EN ISO 717-2:2021
INTERNATIONAL STANDARD ISO 717-2:2020(E)
Acoustics — Rating of sound insulation in buildings and of
building elements —
Part 2:
Impact sound insulation
1 Scope
This document
a) defines single-number quantities for impact sound insulation in buildings and of floors,
b) gives rules for determining these quantities from the results of measurements carried out in
one-third-octave bands in accordance with ISO 10140-3 and ISO 16283-2, and in octave bands in
accordance with that option in ISO 16283-2 for field measurements only,
c) defines single-number quantities for the impact sound reduction of floor coverings and floating
floors calculated from the results of measurements carried out in accordance with ISO 10140-3, and
d) specifies a procedure for evaluating the weighted reduction in impact sound pressure level by floor
coverings on lightweight floors.
The single-number quantities in accordance with this document are intended for rating impact
sound insulation and for simplifying the formulation of acoustical requirements in building codes. An
additional single-number evaluation in steps of 0,1 dB is indicated where it is needed for the expression
of uncertainty (except for spectrum adaptation terms). Numerical values of the single-number
quantities are specified where required for calculations.
The rating of measurements over an enlarged frequency range is given in Annex A.
A method for obtaining single-number quantities for bare heavy floors according to their performance
in combination with floor coverings is given in Annex B.
Example calculations of single-number quantities are given in Annex C.
The rating of measurements with a heavy and soft impact source (rubber ball) is given in Annex D.
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 10140-1, Acoustics — Laboratory measurement of sound insulation of building elements — Part 1:
Application rules for specific products
ISO 10140-3:2010, Acoustics — Laboratory measurement of sound insulation of building elements —
Part 3: Measurement of impact sound insulation
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
© ISO 2020 – All rights reserved 1

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SIST EN ISO 717-2:2021
ISO 717-2:2020(E)

ISO 16283-2:2018, Acoustics — Field measurement of sound insulation in buildings and of building
elements — Part 2: Impact 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
single-number quantity for impact sound insulation rating
value of the relevant reference curve at 500 Hz after shifting it in accordance with the method specified
in 4.3.1 or the value of the relevant reference curve at 500 Hz after shifting it in accordance with the
method specified in 4.3.2, reduced by 5 dB
Note 1 to entry: Terms and symbols for the single-number quantity used depend on the type of measurement.
Examples are listed in Table 1 for impact sound insulation properties of building elements and in Table 2 for
impact sound insulation in buildings. In general, new single-number quantities are derived in a similar way.
Note 2 to entry: This quantity is expressed in decibels.
3.2
spectrum adaptation term
C
I
value to be added to the single-number quantity (e.g. L ) to take account of the unweighted impact
n
sound level, thereby representing the characteristics of typical walking noise spectra
Note 1 to entry: This quantity is expressed in decibels.
3.3
weighted reduction in impact sound pressure level
difference between the weighted normalized impact sound pressure levels derived with a bare heavy
reference floor or a lightweight reference floor, without and with a floor covering
Note 1 to entry: The quantity derived with a bare heavy reference floor is denoted by ΔL and is expressed in
w
decibels.
Note 2 to entry: The quantity derived with a lightweight reference floor is denoted by ΔL and is expressed in
t,w
decibels. According to the type of reference floor it is denoted as ΔL , ΔL , ΔL .
t1,w t2,w t3,w
3.4
equivalent weighted normalized impact sound pressure level of a bare heavy floor
L
n,eq,0,w
sum of the weighted normalized impact sound pressure level of the bare floor under test with the
reference floor covering and the weighted reduction in impact sound pressure level of the reference
floor covering
Note 1 to entry: This quantity is calculated in accordance with the method specified in this document.
Note 2 to entry: This quantity is expressed in decibels.
3.5
A-weighted maximum impact sound pressure level
L'
iA,Fmax
A-weighted maximum impact sound pressure level determined with Fast time-weighting when
measured with a heavy and soft impact source, the rubber ball
Note 1 to entry: This quantity is expressed in decibels.
2 © ISO 2020 – All rights reserved

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SIST EN ISO 717-2:2021
ISO 717-2:2020(E)

Note 2 to entry: For field measurements it is denoted as L' .
i,Fmax
Note 3 to entry: It is determined as described in ISO 10140-3, ISO 10140-5 or ISO 16283-2. The reported values
are averaged over all receiving points and all source positions.
3.6
Standardized A-weighted maximum impact sound pressure level
L'
iA,Fmax,V,T
A-weighted maximum impact sound pressure level determined with Fast time-weighting when
measured with a heavy and soft impact source, the rubber ball, and increased by a correction term for
room volume and reduced by a correction term for reverberation time and Fast time weighting
Note 1 to entry: This quantity is expressed in decibels.
Note 2 to entry: For field measurements it is denoted as L' .
i,Fmax,V,T
Note 3 to entry: It is determined as described in ISO 10140-3, ISO 10140-5 or ISO 16283-2. The reported values
are averaged over all receiving points and all source positions.
4 Procedure for evaluating single-number quantities for impact sound
insulation rating
4.1 General
The values obtained in accordance with ISO 10140-3 and ISO 16283-2 are compared with reference
values (see 4.2) at the frequencies of measurement within the range 100 Hz to 3 150 Hz for measurements
in one-third-octave bands or 125 Hz to 2 000 Hz for measurements in octave bands.
The comparison shall be carried out in accordance with 4.3.
Table 1 — Single-number quantity for impact sound insulation of floors
Derived from one-third-octave band values
Defined in
Single-number quantity Term and symbol
Weighted normalized impact Normalized impact sound pressure
ISO 10140-3:2010 Formula (1)
sound pressure level, L level, L
n,w n
Table 2 — Single-number quantities for impact sound insulation in buildings
Derived from one-third-octave band or octave band values
Defined in
Single-number quantity Term and symbol
Weighted normalized impact
Normalized impact sound pressure
ISO 16283-2:2018 Formula (3)
′
sound pressure level, L ′
level, L
nw,
n
Weighted standardized impact
Standardized impact sound
ISO 16283-2:2018 Formula (1)
′
sound pressure level, L ′
pressure level, L
nwT,
nT
© ISO 2020 – All rights reserved 3

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ISO 717-2:2020(E)

4.2 Reference values
The set of reference values used for comparison with measurement results shall be as given in Table 3.
The reference curves are shown in Figures 1 and 2.
NOTE The reference values for the octave bands 125 Hz to 1 000 Hz are equivalent to the energetic sum
(rounded to integers) of these for the relevant one-third-octave band. The energetic sum from one-third-octave
bands 800 Hz, 1 000 Hz and 1250 Hz is 61,41 dB which is rounded to 61 dB. Despite this, the reference value for
the octave band 1 000 Hz is 62 dB to keep it consistent with older versions of this standard. The reference value
for the octave band 2 000 Hz has been reduced to take care of the one-third-octave band 3 150 Hz, which (for
bare heavy floors) can contribute considerably to the unfavourable deviations.
4.3 Method of comparison
4.3.1 Measurements in one-third-octave bands
′ ′
To evaluate the results of a measurement of L , L or L in one-third-octave bands, the measurement
n
n nT
1)
data shall be given to one decimal place. Shift the reference curve in increments of 1 dB (0,1 dB for the
purpose of expression of uncertainty) towards the measured curve until the sum of unfavourable
deviations is as large as possible but not more than 32,0 dB.
An unfavourable deviation at a particular frequency occurs when the results of measurements exceed
the reference value. Only the unfavourable deviations shall be taken into account.
The value, in decibels, of the reference curve at 500 Hz, after shifting it in accordance with this
′ ′
procedure, is L , L or L respectively.
n,w
nw, nwT,
Table 3 — Reference values for impact sound
Reference values
Frequency
dB
Hz One-third-octave bands Octave bands
100 62
125 62 67
160 62
200 62
250 62 67
315 62
400 61
500 60 65
630 59
800 58
1 000 57 62
1 250 54
1) The different parts of ISO 10140 and ISO 16283 state that the results shall be reported “to one decimal place”.
However, if the octave or one-third-octave values have been reported with more than one decimal digit, the values
shall be reduced to one decimal place before use in the calculation of the single number rating. This is done by taking
the value in tenths of a decibel closest to the reported values: XX,XYZ ZZ … is rounded to XX,X if Y is less than 5 and
to XX,X + 0,1 if Y is equal to or greater than 5. Software developers should ensure that this reduction applies to the
true input values and not only to the displayed precision (as shown on the screen or printed on paper). Generally
this can be implemented by the following sequence of instructions: multiply the (positive) number XX,XYZ ZZ … by
[1]
10 and add 0,5, take the integer part and then divide the result by 10. For further details see ISO 80000-1 .
4 © ISO 2020 – All rights reserved

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Table 3 (continued)
Reference values
Frequency
dB
Hz One-third-octave bands Octave bands
1 600 51
2 000 48 49
2 500 45
3 150 42
4.3.2 Measurements in octave bands
′ ′
To evaluate the results of a measurement of L or L in octave bands, the measurement data shall be
n nT
1)
given to one decimal place. Shift the reference curve in increments of 1 dB (0,1 dB for the purpose of
expression of uncertainty) towards the measured curve until the sum of unfavourable deviations is as
large as possible but not more than 10,0 dB.
The value, in decibels, of the reference curve at 500 Hz, after shifting it in accordance with this
′ ′
procedure and then reducing it by 5 dB is L or L , respectively.
nw, nwT,
An unfavourable deviation at a particular frequency occurs when the results of measurements exceed
the reference value. Take into account only the unfavourable deviations.
4.4 Statement of results
The appropriate single-number quantity shall be given with reference to this document. The results of
measurements shall also be given in the form of a diagram as specified in ISO 10140-3 and ISO 16283-2.
The uncertainty of the weighted single-number quantities may also be stated, in accordance with
ISO 12999-1. In this case the numbers shall be given to one decimal place.
EXAMPLE
L = 53,21± ,0
n,w
Spectrum adaptation terms do not have uncertainty values of their own.
For field measurements in accordance with ISO 16283-2, it shall be stated whether the single-number
quantity is calculated from results in one-third-octave bands or octave bands. In general, there can
be differences between single-number quantities calculated from one-third octave or octave band
measurements of about ±1 dB. Ratings based on one-third octave band measurements are preferred.
© ISO 2020 – All rights reserved 5

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ISO 717-2:2020(E)

Key
f frequency, in Hz
L reference value, in dB
Figure 1 — Curve of reference values for impact sound, one-third octave bands
Key
f frequency, in Hz
L reference value, in dB
Figure 2 — Curve of reference values for impact sound, octave bands
4.5 Impact sound insulation measured with heavy and soft impact sources
When impact measurements are carried out using the rubber ball as an impact source as described in
ISO 10140-3 or ISO 16283-2, the rating method to determine the single-number quantity, which is an
A-weighted maximum impact sound pressure level, shall be calculated according to Annex D.
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5 Procedure for evaluating the weighted reduction in impact sound pressure
level by floor coverings on bare heavy floors
5.1 General
The reduction of impact sound pressure level (improvement of impact sound insulation), ΔL, of floor
coverings when tested on a homogeneous concrete slab floor as described in ISO 10140-1 is independent
of the normalized impact sound pressure level of the bare floor, L . However, the weighted normalized
n,0
impact sound pressure levels of the floor with and without a floor covering depend to some extent on
L . In order to obtain comparable values for ΔL between laboratories, it is therefore necessary to
n,0 w
relate the measured values of ΔL to a reference floor.
5.2 Reference floor
The reference flo
...

SLOVENSKI STANDARD
oSIST prEN ISO 717-2:2020
01-marec-2020
Akustika - Vrednotenje zvočne izolirnosti v stavbah in zvočne izolirnosti gradbenih
elementov - 2. del: Izolirnost pred udarnim zvokom (ISO/DIS 717-2:2019)
Acoustics - Rating of sound insulation in buildings and of building elements - Part 2:
Impact sound insulation (ISO/DIS 717-2:2019)
Akustik - Bewertung der Schalldämmung in Gebäuden und von Bauteilen - Teil 2:
Trittschalldämmung (ISO/DIS 717-2:2019)
Acoustique - Évaluation de l'isolement acoustique des immeubles et des éléments de
construction - Partie 2: Protection contre le bruit de choc (ISO/DIS 717-2:2019)
Ta slovenski standard je istoveten z: prEN ISO 717-2
ICS:
91.120.20 Akustika v stavbah. Zvočna Acoustics in building. Sound
izolacija insulation
oSIST prEN ISO 717-2:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 717-2:2020

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oSIST prEN ISO 717-2:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 717-2
ISO/TC 43/SC 2 Secretariat: DIN
Voting begins on: Voting terminates on:
2019-12-30 2020-03-23
Acoustics — Rating of sound insulation in buildings and of
building elements —
Part 2:
Impact sound insulation
Acoustique — Évaluation de l'isolement acoustique des immeubles et des éléments de construction —
Partie 2: Protection contre le bruit de choc
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 717-2:2019(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

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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

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Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Procedure for evaluating single-number quantities for impact sound insulation rating .3
4.1 General . 3
4.2 Reference values . 3
4.3 Method of comparison . 4
4.3.1 Measurements in one-third-octave bands . 4
4.3.2 Measurements in octave bands . 4
4.4 Statement of results . 5
5 Procedure for evaluating the weighted reduction in impact sound pressure level by
floor coverings on bare heavy floors . 6
5.1 General . 6
5.2 Reference floor . 6
5.3 Calculation . 8
5.4 Statement of results . 9
6 Procedure for evaluating the weighted reduction in impact sound pressure level by
floor coverings on lightweight floors . 9
6.1 General . 9
6.2 Reference curves for the reference lightweight floors used to calculate ΔL . 9
t,w
6.3 Calculation . 9
6.4 Statement of results . 9
Annex A (informative) Additional weighting procedure .10
Annex B (informative) Procedure for evaluating the equivalent weighted normalized
impact sound pressure level of bare heavy floors .12
Annex C (informative) Examples of the evaluation of a single-number quantity .14
Annex D (normative) Rating method of heavy/soft impact sound by A-weighted maximum
impact sound pressure level .18
Bibliography .21
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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 fourth edition cancels and replaces the third edition (ISO 717-2:2013), which has been technically
revised.
The purpose of this revised version is to:
The main changes compared to the previous edition are as follows:
— Introduction of a method for rating heavy/soft impact sound insulation performance of building and
building materials by A-weighted maximum impact sound pressure level.
A list of all parts in the ISO 717 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

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Introduction
Methods of measurement of impact sound insulation in buildings and of building elements have
been standardized in ISO 10140-3 and ISO 16283-2. These methods give values for the impact sound
insulation which are frequency dependent. The purpose of this part of ISO 717 is to standardize a
method whereby the frequency-dependent values of impact sound insulation can be converted into a
single number characterizing the acoustical performance.
The method has been widely used since 1968. However, since there is some evidence that it could be
improved, a spectrum adaptation term is added and it is recommended that experience be gathered
with this.
References to standards which provide data for single-number evaluation are meant to be examples
and not complete surveys.
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oSIST prEN ISO 717-2:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 717-2:2019(E)
Acoustics — Rating of sound insulation in buildings and of
building elements —
Part 2:
Impact sound insulation
1 Scope
This part of ISO 717:
a) defines single-number quantities for impact sound insulation in buildings and of floors;
b) gives rules for determining these quantities from the results of measurements carried out in
one-third-octave bands in accordance with ISO 10140-3 and ISO 16283-2, and in octave bands in
accordance with that option in ISO 16283-2 for field measurements only;
c) defines single-number quantities for the impact sound reduction of floor coverings and floating
floors calculated from the results of measurements carried out in accordance with ISO 10140-3;
d) specifies a procedure for evaluating the weighted reduction in impact sound pressure level by floor
coverings on lightweight floors.
The single-number quantities in accordance with this part of ISO 717 are intended for rating impact
sound insulation and for simplifying the formulation of acoustical requirements in building codes. An
additional single-number evaluation in steps of 0,1 dB is indicated for the expression of uncertainty
(except for spectrum adaptation terms).The required numerical values of the single-number quantities
are specified according to varying needs.
The rating of results from measurements carried out over an enlarged frequency range is described in
Annex A.
A method for obtaining single-number quantities for bare heavy floors according to their performance
in combination with floor coverings is described in Annex B.
Examples of the calculation of a single-number quantity is given in Annex C.
A method for rating heavy/soft impact sound insulation performance of building and building materials
by A-weighted maximum impact sound pressure level is given in Annex D.
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 16283-2:2018, Acoustics — Field measurement of sound insulation in buildings and of building
elements — Part 2: Impact sound insulation
ISO 10140-1, Acoustics — Laboratory measurement of sound insulation of building elements — Part 1:
Application rules for specific products
ISO 10140-3:2010, Acoustics — Laboratory measurement of sound insulation of building elements —
Part 3: Measurement of impact sound insulation
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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/
3.1
single-number quantity for impact sound insulation rating derived from one-third-octave band
measurements
value of the relevant reference curve at 500 Hz after shifting it in accordance with the method specified
in this part of ISO 717
Note 1 to entry: This quantity is expressed in decibels.
3.2
single-number quantity for impact sound insulation rating derived from octave band
measurements
value of the relevant reference curve at 500 Hz after shifting it in accordance with the method specified
in this part of ISO 717, reduced by 5 dB
Note 1 to entry: Terms and symbols for the single-number quantity used depend on the type of measurement.
Examples are listed in Table 1 for impact sound insulation properties of building elements and in Table 2 for
impact sound insulation between rooms in buildings.
Note 2 to entry: In order to distinguish clearly between values with and without flanking transmission, primed
′
symbols (e.g. L ) are used to denote values obtained with flanking transmission.
n
Note 3 to entry: This quantity is expressed in decibels.
3.3
weighted reduction in impact sound pressure level
difference between the weighted normalized impact sound pressure levels derived with a bare heavy
reference floor or with a lightweight reference floor without and with a floor covering, obtained in
accordance with the method specified in this part of ISO 717.
Note 1 to entry: The quantity derived with a lightweight heavy reference floor is denoted by ΔL and is expressed
w
in decibels.
Note 2 to entry: The quantity derived with a bare heavy reference floor is denoted by ΔL and is expressed in
t,w
decibels. According to the type of reference floor it may be denoted by ΔL , ΔL , ΔL .
t1,w t2,w t3,w
3.4
spectrum adaptation term
C
I
value, in decibels, to be added to the single-number quantity to take account of the unweighted impact
sound level, thereby representing the characteristics of typical walking noise spectra
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3.5
equivalent weighted normalized impact sound pressure level of a bare heavy floor
sum of the weighted normalized impact sound pressure level of the bare floor under test with the
reference floor covering and the weighted reduction in impact sound pressure level of the reference
floor covering obtained in accordance with the method specified in this part of ISO 717
Note 1 to entry: This quantity is denoted by L and is expressed in decibels.
n,eq,0,w
Table 1 — Quantities of impact sound insulation properties of floors
Derived from one-third-octave band values
Defined in
Single-number quantity Term and symbol
Weighted normalized impact Normalized impact sound
ISO 10140-3:2010 Formula (1)
sound pressure level, L pressure level, L
n,w n
Table 2 — Quantities of impact sound insulation between rooms in buildings
Derived from one-third-octave band values or
octave-band values
Defined in
Single-number quantity Term and symbol
Weighted normalized impact
Normalized impact sound
ISO 16283-2:2018 Formula (2)
′
sound pressure level, L ′
pressure level, L
nw,
n
Weighted standardized impact
Standardized impact sound
ISO 16283-2:2018 Formula (1)
′
sound pressure level, L ′
pressure level, L
nwT,
nT

4 Procedure for evaluating single-number quantities for impact sound
insulation rating
4.1 General
The values obtained in accordance with ISO 10140-3 and ISO 16283-2 are compared with reference
values (see 4.2) at the frequencies of measurement within the range 100 Hz to 3 150 Hz for measurements
in one-third-octave bands or 125 Hz to 2 000 Hz for measurements in octave bands.
The comparison shall be carried out in accordance with 4.3.
4.2 Reference values
The set of reference values used for comparison with measurement results shall be as given in Table 3.
The reference curves are shown in Figures 1 and 2.
NOTE The reference values for the octave bands 125 Hz to 1 000 Hz are equivalent to the energetic sum
(rounded to integers) of these for the relevant one-third-octave band values. The reference value for the octave
band 2 000 Hz has been reduced to take care of the one-third-octave band 3 150 Hz, which (for bare heavy floors)
may contribute considerably to the unfavourable deviations.
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4.3 Method of comparison
4.3.1 Measurements in one-third-octave bands
′ ′
To evaluate the results of a measurement of L , L or L in one-third-octave bands, the measurement
n
n nT
1)
data shall be given to one decimal place. Shift the reference curve in increments of 1 dB (0,1 dB for the
purpose of expression of uncertainty) towards the measured curve until the sum of unfavourable
deviations is as large as possible but not more than 32,0 dB.
An unfavourable deviation at a particular frequency occurs when the results of measurements exceed
the reference value. Only the unfavourable deviations shall be taken into account.
The value, in decibels, of the reference curve at 500 Hz, after shifting it in accordance with this
′ ′
procedure, is L , L or L respectively.
n,w
nw, nwT,
Table 3 — Reference values for impact sound
Reference values
Frequency
dB
Hz One-third-octave bands Octave bands
100 62
125 62 67
160 62
200 62
250 62 67
315 62
400 61
500 60 65
630 59
800 58
1 000 57 62
1 250 54
1 600 51
2 000 48 49
2 500 45
3 150 42
4.3.2 Measurements in octave bands
′ ′
To evaluate the results of a measurement of L or L in octave bands, the measurement data shall be
n nT
1)
given to one decimal place. Shift the reference curve in increments of 1 dB (0,1 dB for the purpose of
expression of uncertainty) towards the measured curve until the sum of unfavourable deviations is as
large as possible but not more than 10,0 dB.
The value, in decibels, of the reference curve at 500 Hz, after shifting it in accordance with this
′ ′
procedure and then reducing it by 5 dB is L or L , respectively.
nw, nwT,
An unfavourable deviation at a particular frequency occurs when the results of measurements exceed
the reference value. Take into account only the unfavourable deviations.
1) The different parts of ISO 10140 and ISO 16283 state that the results shall be reported “to one decimal place”.
However, if the octave or one-third-octave values have been reported with more than one decimal digit, the values
shall be reduced to one decimal place before use in the calculation of the single number rating. This is done by taking
the value in tenths of a decibel closest to the reported values: XX,XYZ ZZ … is rounded to XX,X if Y is less than 5 and
to XX,X + 0,1 if Y is equal to or greater than 5. Software developers should ensure that this reduction applies to the
true input values and not only to the displayed precision (as shown on the screen or printed on paper). Generally
this can be implemented by the following sequence of instructions: multiply the (positive) number XX,XYZ ZZ … by
[1]
10 and add 0,5, take the integer part and then divide the result by 10. For further details see ISO 80000-1.
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4.4 Statement of results
The appropriate single-number quantity shall be given with reference to this part of ISO 717, in
accordance with ISO 12999-1. The results of measurements shall also be given in the form of a diagram
as specified in ISO 10140-3 and ISO 16283-2.
The uncertainty of the weighted single-number quantities may also be stated. In this case the numbers
shall be given to one decimal place.
EXAMPLE
L =±53,,20dB 8dB
nw,
Spectrum adaptation terms do not have uncertainty values of their own.
For field measurements in accordance with ISO 16283-2, it shall be stated whether the single-number
quantity is calculated from measuring results in one-third-octave bands or octave bands. In general,
there can be differences between single-number quantities calculated from one-third-octave or octave
band measurements of about ±1 dB. Ratings based on one-third-octave band measurements are
preferred.
Key
L reference value f frequency
Figure 1 — Curve of reference values for impact sound, one-third-octave bands
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Key
L reference value f frequency
Figure 2 — Curve of reference values for impact sound, octave bands
5 Procedure for evaluating the weighted reduction in impact sound pressure
level by floor coverings on bare heavy floors
5.1 General
The reduction of impact sound pressure level (improvement of impact sound insulation), ΔL, of floor
coverings when tested on a homogeneous concrete slab floor as described in ISO 10140-1 is independent
of the normalized impact sound pressure level of the bare floor, Ln,0. However, the weighted normalized
impact sound pressure levels of the floor with and without a floor covering depend to some extent on
Ln,0. In order to obtain comparable values for ΔL between laboratories, it is therefore necessary to
w
relate the measured values of ΔL to a reference floor.
5.2 Reference floor
The reference floor is defined by the values for the normalized impact sound pressure level L given
n,r,0
in Table 4 and Figure 3.
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Table 4 — Normalized impact sound pressure level
of the reference floor
a a
Frequency L L L
n,r,0 n,t,r,0 n,t,r,0
for heavyweight for lightweight for lightweight
floors floors C1 and C2 floors C3
Hz dB dB dB
100 67 78 69
125 67,5 78 72
160 68 78 75
200 68,5 78 78
250 69 78 78
315 69,5 78 78
400 70 76 78
500 70,5 74 78
630 71 72 78
800 71,5 69 76
1 000 72 66 74
1 250 72 63 72
1 600 72 60 69
2 000 72 57 66
2 500 72 54 63
3 150 72 51 60
L or L dB 78 (77,6 dB) 72 (71,8 dB) 75 (75,0 dB)
n,r,0w n,t,r,0w
C or C dB −11 (-10,3 dB) 0 (0,0 dB) −3 (-2,8 dB)
I,r,0 I,t,r,0
a
The index, t, is used to distinguish results for lightweight floors from those for heavyweight floors; it originates from
the word “timber”.
The weighted normalized impact sound pressure level of the heavy reference floor, L , evaluated in
n,r,0,w
accordance with 4.3.1, is 78 dB (77,6 dB).
NOTE The values given in Table 4 represent a straight-line idealization of the normalized impact sound
pressure level of a 120 mm homogeneous concrete floor slab, levelling off, as in the practical case, at frequencies
above 1 000 Hz.
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Key
X frequency (Hz) 1 heavyweight floor
Y L (dB re 20 µPa) 2 lightweight floors C1 and C2
n,(t,)r,0
3 lightweight floor C3
Figure 3 — Reference curves for standard reference floor elements
5.3 Calculation
Calculate the weighted reduction of impact sound pressure level ΔL according to Formulas (1) and (2):
w
LL=−ΔL (1)
n,rn,r,0
ΔLL=− LL=78()77,6 dB− (2)
wn,,rw0,,nr,,wn rw,
where
L is the calculated normalized impact sound pressure level of the reference floor with the
n,r
floor covering under test;
L is the defined normalized impact sound pressure level of the reference floor (see Table 4);
n,r,0
ΔL is the reduction in impact sound pressure level measured in accordance with ISO 10140-1;
L is the calculated weighted normalized impact sound pressure level of the reference floor
n,r,w
with the floor covering under test;
L is obtained from L in accordance with 4.3.1.
n,r,0,w n,r,0
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5.4 Statement of results
The single-number quantity ΔL shall be given with reference to this part of ISO 717, in accordance
w
with ISO 12999-1. The results of measurements shall also be given in the form of a diagram as specified
in ISO 10140-1.
The uncertainty of ΔL may also be stated. In this case the numbers shall be given to one decimal place.
w
EXAMPLE
ΔL =±18,,90dB 8dB
w
Spectrum adaptation terms do not have uncertainty values of their own.
The reduction in impact sound pressure level measured on a concrete floor slab as defined in
ISO 10140-1 and the single-number quantity ΔL may only be used in connection with similar types
w
of massive floors (concrete, hollow concrete, hollow bricks, etc.); it is not appropriate for use on other
types of construction.
6 Procedure for evaluating the weighted reduction in impact sound pressure
level by floor coverings on lightweight floors
6.1 General
The reduction of impact sound pressure level (improvement of impact sound insulation), ΔL , ΔL ,
t,1 t,2
ΔL , of floor coverings when tested on one of the three lightweight reference floors as described in
t,3
ISO 10140-5 is independent of the normalized impact sound pressure level of the bare reference floor
L , L and L , respectively.
n,t1,0 n,t2,0 n,t3,0
However, the weighted, normalized impact sound pressure levels of a lightweight floor with and
without a floor covering depend on the L value for the bare floor on which the floor covering is
n,t,0
used. In order to obtain values for ΔL , which are comparable between laboratories and especially
t,,w
which can be used to calculate the normalized impact sound pressure level of lightweight floors with
the floor covering, it is necessary to relate the measured values of ΔL , ΔL and ΔL to the respective
t,1 t,2 t,3
reference curves for the lightweight floors in ISO 10140-5.
6.2 Reference curves for the reference lightweight floors used to calculate ΔL
t,w
In ISO 10140-5, there are three different refere
...