SIST EN ISO 26101-2:2024
(Main)Acoustics - Test methods for the qualification of the acoustic environment - Part 2: Determination of the environmental correction (ISO 26101-2:2024)
Acoustics - Test methods for the qualification of the acoustic environment - Part 2: Determination of the environmental correction (ISO 26101-2:2024)
This document specifies methods for qualifying an environment that approximates to an acoustic free field near one or more reflecting planes. The goal of the qualification is to determine the environmental correction K2, which is used to correct for reflected sound when determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping the noise source (machinery or equipment) in such an environment. In addition, the environmental correction K2 is used as an input parameter for the determination of the local environmental correction K3 which is used to determine the emission sound pressure level in an environment that approximates to an acoustic free field near one or more reflecting planes.
In practice, the K2 value determined will be a function of both the reflected sound from the test environment and the shape and size of the measurement surface used for the K2 determination. For the purposes of this standard and the standards that refer to it, the differences between K2 values determined with different measurement surfaces are assumed to be included in the stated measurement uncertainty for the test method.
Akustik - Prüfverfahren zur Qualifizierung der akustischen Umgebung - Teil 2: Bestimmung der Umgebungskorrektur (ISO 26101-2:2024)
Dieses Dokument legt Verfahren zur Qualifizierung einer Umgebung fest, die sich einem akustischen Freifeld in der Nähe einer oder mehrerer reflektierender Ebenen annähert. Ziel der Qualifizierung ist es, die Umgebungskorrektur K2 zu bestimmen, die zur Korrektur des reflektierten Schalls bei der Bestimmung des Schallleistungspegels oder des Schallenergiepegels einer Geräuschquelle aus Schalldruckpegeln verwendet wird, die an einer die Geräuschquelle (Maschinen oder Geräte) umgebenden Oberfläche in einer solchen Umgebung gemessen werden.
In der Praxis wird der bestimmte K2-Wert eine Funktion sowohl des von der Messumgebung reflektierten Schalls als auch der Form und Größe der für die K2-Bestimmung verwendeten Messfläche sein. Für die Anwendung dieses Dokuments und der Dokumente, die sich darauf beziehen, wird davon ausgegangen, dass die Unterschiede zwischen den mit verschiedenen Messflächen bestimmten K2-Werten in der angegebenen Messunsicherheit für das Prüfverfahren enthalten sind.
Acoustique - Méthodes d’essai pour la qualification de l'environnement acoustique - Partie 2: Détermination de la correction d’environnement (ISO 26101-2:2024)
Le présent document spécifie des méthodes de qualification d’un environnement qui se rapproche d’un champ acoustique libre à proximité d’un ou de plusieurs plans réfléchissants. L’objectif de la qualification est de déterminer la correction d’environnement , qui est utilisée pour corriger le bruit réfléchi lors de la détermination du niveau de puissance acoustique ou du niveau d’énergie acoustique d’une source de bruit à partir des niveaux de pression acoustique mesurés sur une surface enveloppant la source de bruit (machine ou équipement) dans un tel environnement.
En pratique, la valeur déterminée dépend aussi bien du son réfléchi par l’environnement d’essai que de la forme et de la taille de la surface de mesure utilisée pour la détermination de . Pour les besoins du présent document et des documents qui y font référence, les différences entre les valeurs de déterminées avec différentes surfaces de mesure sont réputées être incluses dans l’incertitude de mesure déclarée pour la méthode d’essai.
Akustika - Preskusne metode za kvalifikacijo akustičnega okolja - 2. del: Določanje okoljskih popravkov (ISO 26101-2:2024)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2024
Akustika - Preskusne metode za kvalifikacijo akustičnega okolja - 2. del: Določanje
okoljskih popravkov (ISO 26101-2:2024)
Acoustics - Test methods for the qualification of the acoustic environment - Part 2:
Determination of the environmental correction (ISO 26101-2:2024)
Akustik - Prüfverfahren zur Qualifizierung der akustischen Umgebung - Teil 2:
Bestimmung der Umgebungskorrektur (ISO 26101-2:2024)
Acoustique - Méthodes d’essai pour la qualification de l'environnement acoustique -
Partie 2: Détermination de la correction d’environnement (ISO 26101-2:2024)
Ta slovenski standard je istoveten z: EN ISO 26101-2:2024
ICS:
17.140.01 Akustična merjenja in Acoustic measurements and
blaženje hrupa na splošno noise abatement in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 26101-2
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2024
EUROPÄISCHE NORM
ICS 17.140.01
English Version
Acoustics - Test methods for the qualification of the
acoustic environment - Part 2: Determination of the
environmental correction (ISO 26101-2:2024)
Acoustique - Méthodes d'essai pour la qualification de Akustik - Prüfverfahren zur Qualifizierung der
l'environnement acoustique - Partie 2: Détermination akustischen Umgebung - Teil 2: Bestimmung der
de la correction d'environnement (ISO 26101-2:2024) Umgebungskorrektur (ISO 26101-2:2024)
This European Standard was approved by CEN on 2 June 2024.
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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 26101-2:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 26101-2:2024) has been prepared by Technical Committee ISO/TC 43
"Acoustics" in collaboration with Technical Committee CEN/TC 211 “Acoustics” the secretariat of which
is held by DIN.
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 December 2024, and conflicting national standards
shall be withdrawn at the latest by December 2024.
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.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 26101-2:2024 has been approved by CEN as EN ISO 26101-2:2024 without any
modification.
International
Standard
ISO 26101-2
First edition
Acoustics — Test methods for
2024-06
the qualification of the acoustic
environment —
Part 2:
Determination of the environmental
correction
Acoustique — Méthodes d’essai pour la qualification de
l'environnement acoustique —
Partie 2: Détermination de la correction d’environnement
Reference number
ISO 26101-2:2024(en) © ISO 2024
ISO 26101-2:2024(en)
© ISO 2024
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 26101-2:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Qualification procedures for the acoustic environment . 3
4.1 General .3
4.2 Absolute comparison test .3
4.3 Methods based on room absorption . .3
4.4 Inverse-square-law qualification of parallelepiped and cylindrical measurement
surfaces .3
4.5 Approximate method based on an estimation of the equivalent absorption area.3
5 Absolute comparison test . 4
5.1 General .4
5.2 Locations of reference sound source in test environment .5
5.3 Information to be recorded and reported .5
6 Determination of the environmental correction based on room absorption . 6
6.1 General .6
6.2 Reverberation method .6
6.3 Two-surface method .6
6.4 Determination of the equivalent absorption area with a reference sound source (direct
method) .7
6.5 Information to be recorded and reported .8
7 Inverse-square-law qualification of parallelepiped and cylindrical measurement
surfaces . 8
7.1 General .8
7.2 Qualification criteria .9
7.2.1 General .9
7.2.2 Maximum allowable deviations from inverse square law.9
7.2.3 Frequency range to be qualified .9
7.2.4 Maximum qualified volume .9
7.3 Installation of test sound sources and microphone traverses .10
7.3.1 Test sound source requirements .10
7.3.2 Test sound source location .10
7.3.3 Microphone traverse paths for parallelepiped and cylindrical measurement
surfaces .10
7.4 Test procedure . 12
7.4.1 Analysis bandwidth . 12
7.4.2 Generation of sound . . 12
7.4.3 Spatial resolution of the measurement points . 12
7.5 Information to be recorded and reported . 13
8 Approximate method based on an estimation of the equivalent absorption area.13
8.1 General . 13
8.2 Information to be recorded and reported . 13
Annex A (informative) Uncertainty of the environmental correction . 14
Bibliography .
...
SLOVENSKI STANDARD
oSIST prEN ISO 26101-2:2023
01-marec-2023
Akustika - Preskusne metode za kvalifikacijo akustičnega okolja - 2. del: Določanje
popravkov zaradi okolja (ISO/DIS 26101-2:2023)
Acoustics - Test methods for the qualification of the acoustic environment - Part 2:
Determination of the environmental correction (ISO/DIS 26101-2:2023)
Akustik - Prüfverfahren zur Qualifizierung der akustischen Umgebung - Teil 2:
Bestimmung der Umgebungskorrektur (ISO/DIS 26101-2:2023)
Acoustique - Méthodes d’essai pour la qualification de l'environnement acoustique -
Partie 2: Détermination de la correction d’environnement (ISO/DIS 26101-2:2023)
Ta slovenski standard je istoveten z: prEN ISO 26101-2
ICS:
17.140.01 Akustična merjenja in Acoustic measurements and
blaženje hrupa na splošno noise abatement in general
oSIST prEN ISO 26101-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN ISO 26101-2:2023
oSIST prEN ISO 26101-2:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 26101-2
ISO/TC 43/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-01-06 2023-03-31
Acoustics — Test methods for the qualification of the
acoustic environment —
Part 2:
Determination of the environmental correction
ICS: 17.140.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
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 26101-2:2023(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 2023
oSIST prEN ISO 26101-2:2023
ISO/DIS 26101-2:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 26101-2
ISO/TC 43/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
Acoustics — Test methods for the qualification of the
acoustic environment —
Part 2:
Determination of the environmental correction
ICS: 17.140.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: +41 22 749 01 11
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: copyright@iso.org
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 26101-2:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
oSIST prEN ISO 26101-2:2023
ISO/DIS 26101-2:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Qualification procedures for the acoustic environment . 3
4.1 General . 3
4.2 Absolute comparison test . 3
4.3 Methods based on room absorption . 3
4.4 Inverse-square-law qualification of parallelepiped and cylindrical measurement
surfaces . 3
4.5 Approximate method based on an estimation of the equivalent absorption area A . 3
5 Absolute comparison test .4
5.1 General . 4
5.2 Locations of reference sound source in test environment . 5
5.3 Information to be recorded and reported . 5
6 Determination of the environmental correction based on room absorption .6
6.1 General . 6
6.2 Reverberation method . 6
6.3 Two-surface method . 6
6.4 Determination of the equivalent absorption area A with a reference sound source
(direct method) . 7
6.5 Information to be recorded and reported . 8
7 Inverse-square-law qualification of parallelepiped and cylindrical measurement
surfaces . 8
7.1 General . 8
7.2 Qualification criteria . 9
7.2.1 General . 9
7.2.2 Maximum allowable deviations from inverse square law. 9
7.2.3 Frequency range to be qualified . 9
7.2.4 Maximum qualified volume . 9
7.3 Installation of test sound sources and microphone traverses . 10
7.3.1 Test sound source requirements . 10
7.3.2 Test sound source location . 10
7.3.3 Microphone traverse paths for parallelepiped and cylindrical measurement
surfaces . 10
7.4 Test procedure .12
7.4.1 Analysis bandwidth .12
7.4.2 Generation of sound . .12
7.4.3 Spatial resolution of the measurement points .12
7.5 Information to be recorded and reported . 13
8 Approximate method based on an estimation of the equivalent absorption area A .13
8.1 General .13
8.2 Information to be recorded and reported . 14
Annex A (informative) Uncertainty of the environmental correction .15
Bibliography .16
iii
oSIST prEN ISO 26101-2:2023
ISO/DIS 26101-2:2022(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.
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part
...
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