Acoustics - Determination and application of measurement uncertainties in building acoustics - Part 2: Sound absorption (ISO 12999-2:2020)

This document specifies how to calculate:
— the uncertainty of sound absorption coefficients and equivalent sound absorption areas measured
according to ISO 354;
— the uncertainty of the practical and weighted sound absorption coefficients determined according
to ISO 11654;
— the uncertainty of the object sound absorption coefficient according to ISO 20189; and
— the uncertainty of the single number rating determined according to EN 1793-1.
Furthermore, the use of uncertainties in reporting measured or weighted sound absorption coefficients
is explained.

Akustik - Bestimmung und Anwendung der Messunsicherheiten in der Bauakustik - Teil 2: Schalldämpfung (ISO 12999-2:2020)

Dieses Dokument legt fest, wie Folgendes zu berechnen ist:
—   die Unsicherheit von nach ISO 354 gemessenen Schallabsorptionsgraden und äquivalenten Schall-absorptionsflächen;
—   die Unsicherheit der nach ISO 11654 ermittelten praktischen und bewerteten Schallabsorptionsgrade;
—   die Unsicherheit des Schallabsorptionsgrades einzelner Objekte nach ISO 20189;
—   die Unsicherheit der nach EN 1793 1 ermittelten Einzahl Angabe.
Des Weiteren wird die Verwendung von Unsicherheiten bei der Angabe von gemessenen oder bewerteten Schallabsorptionsgraden erläutert.

Acoustique - Détermination et application des incertitudes de mesure dans l'acoustique des bâtiments - Partie 2: Absorption acoustique (ISO 12999-2:2020)

Le présent document spécifie comment calculer:
—          l'incertitude des coefficients d'absorption acoustique et des aires d'absorption acoustique équivalentes mesurés conformément à l'ISO 354;
—          l'incertitude des coefficients d'absorption acoustique pratiques et pondérés déterminés conformément à l'ISO 11654;
—          l'incertitude du coefficient d'absorption acoustique d'un objet conformément à l'ISO 20189; et
—          l'incertitude de l'indice unique d'évaluation déterminé conformément à l'EN 1793-1.
Il explique également comment utiliser les incertitudes pour consigner dans le rapport les coefficients d'absorption acoustique mesurés ou pondérés.

Akustika - Ugotavljanje in uporaba merilne negotovosti v gradbeni akustiki - 2. del: Absorpcija zvoka (ISO 12999-2:2020)

General Information

Status
Published
Publication Date
04-Oct-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
28-Jul-2020
Due Date
02-Oct-2020
Completion Date
05-Oct-2020

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SLOVENSKI STANDARD
SIST EN ISO 12999-2:2020
01-november-2020

Akustika - Ugotavljanje in uporaba merilne negotovosti v gradbeni akustiki - 2. del:

Absorpcija zvoka (ISO 12999-2:2020)

Acoustics - Determination and application of measurement uncertainties in building

acoustics - Part 2: Sound absorption (ISO 12999-2:2020)

Akustik - Bestimmung und Anwendung der Messunsicherheiten in der Bauakustik - Teil

2: Schalldämpfung (ISO 12999-2:2020)

Acoustique - Détermination et application des incertitudes de mesure dans l'acoustique

des bâtiments - Partie 2: Absorption acoustique (ISO 12999-2:2020)
Ta slovenski standard je istoveten z: EN ISO 12999-2:2020
ICS:
17.140.01 Akustična merjenja in Acoustic measurements and
blaženje hrupa na splošno noise abatement in general
91.120.20 Akustika v stavbah. Zvočna Acoustics in building. Sound
izolacija insulation
SIST EN ISO 12999-2:2020 en,fr,de

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

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SIST EN ISO 12999-2:2020
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SIST EN ISO 12999-2:2020
EN ISO 12999-2
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2020
EUROPÄISCHE NORM
ICS 17.140.01; 91.120.20
English Version
Acoustics - Determination and application of measurement
uncertainties in building acoustics - Part 2: Sound
absorption (ISO 12999-2:2020)

Acoustique - Détermination et application des Akustik - Bestimmung und Anwendung der

incertitudes de mesure dans l'acoustique des Messunsicherheiten in der Bauakustik - Teil 2:

bâtiments - Partie 2: Absorption acoustique (ISO Schalldämpfung (ISO 12999-2:2020)

12999-2:2020)
This European Standard was approved by CEN on 5 July 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 12999-2:2020 E

worldwide for CEN national Members.
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SIST EN ISO 12999-2:2020
EN ISO 12999-2:2020 (E)
Contents Page

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

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SIST EN ISO 12999-2:2020
EN ISO 12999-2:2020 (E)
European foreword

This document (EN ISO 12999-2:2020) 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 January 2021, and conflicting national standards shall

be withdrawn at the latest by January 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 12999-2:2020 has been approved by CEN as EN ISO 12999-2:2020 without any

modification.
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SIST EN ISO 12999-2:2020
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SIST EN ISO 12999-2:2020
INTERNATIONAL ISO
STANDARD 12999-2
First edition
2020-06
Acoustics — Determination and
application of measurement
uncertainties in building acoustics —
Part 2:
Sound absorption
Acoustique — Détermination et application des incertitudes de
mesure dans l'acoustique des bâtiments —
Partie 2: Absorption acoustique
Reference number
ISO 12999-2:2020(E)
ISO 2020
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SIST EN ISO 12999-2:2020
ISO 12999-2:2020(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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST EN ISO 12999-2:2020
ISO 12999-2:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

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

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

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General approach ................................................................................................................................................................................................ 3

5 Standard uncertainties in one-third octave bands ........................................................................................................... 3

6 Standard uncertainties for the practical sound absorption coefficient ......................................................4

7 Standard uncertainties of single number values ................................................................................................................ 5

8 Reporting uncertainties ................................................................................................................................................................................ 5

Bibliography ................................................................................................................................................................................................................................ 8

© ISO 2020 – All rights reserved iii
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SIST EN ISO 12999-2:2020
ISO 12999-2:2020(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).
A list of all parts in the ISO 12999 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 12999-2:2020
ISO 12999-2:2020(E)
Introduction

An assessment of uncertainties that is comprehensible and close to reality is indispensable for reporting

and applying measured sound absorption. Uncertainties should preferably be determined following the

principles of ISO/IEC Guide 98-3.

ISO/IEC Guide 98-3 specifies a detailed procedure for the uncertainty evaluation that is based upon a

complete mathematical model of the measurement procedure. At the current knowledge, it is impossible

to formulate these models for sound absorption measurements according to ISO 354 and evaluations

according to ISO 11654 or similar. To come to uncertainties all the same, the concept of reproducibility

and repeatability is applied in this document. This concept offers the possibility to state the uncertainty

of a method and of measurements carried out according to the method, based on the results of inter-

laboratory measurements.

Observed uncertainties are probably caused by different laboratory designs. When the method of

ISO 354 for measuring sound absorption is modified, other uncertainties than the ones given in this

document can be applicable.
© ISO 2020 – All rights reserved v
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SIST EN ISO 12999-2:2020
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SIST EN ISO 12999-2:2020
INTERNATIONAL STANDARD ISO 12999-2:2020(E)
Acoustics — Determination and application of
measurement uncertainties in building acoustics —
Part 2:
Sound absorption
1 Scope
This document specifies how to calculate:

— the uncertainty of sound absorption coefficients and equivalent sound absorption areas measured

according to ISO 354;

— the uncertainty of the practical and weighted sound absorption coefficients determined according

to ISO 11654;

— the uncertainty of the object sound absorption coefficient according to ISO 20189; and

— the uncertainty of the single number rating determined according to EN 1793-1.

Furthermore, the use of uncertainties in reporting measured or weighted sound absorption coefficients

is explained.
2 Normative references
There are no normative references in this d
...

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