SIST EN ISO 8528-10:2023
(Main)Reciprocating internal combustion engine driven alternating current generating sets - Part 10: Measurement of airborne noise (ISO 8528-10:2022)
Reciprocating internal combustion engine driven alternating current generating sets - Part 10: Measurement of airborne noise (ISO 8528-10:2022)
This part of ISO 8528 defines measurement methods for the determination of airborne noise emitted by
reciprocating internal combustion engine driven generating sets in such a way that the total of relevant noise emissions, e.g. exhaust and cooling system noise, together with all other sources of engine noise, are evaluated on a similar basis to yield comparable results.
This part of ISO 8528 applies to RIC engine driven AC generating sets for fixed and mobile applications with rigid or flexible mountings. It is applicable for land and marine use, excluding generating sets used on aircraft or to propel land vehicles and locomotives.
Stromerzeugungsaggregate mit Hubkolben-Verbrennungsmotor - Teil 10: Messung von Luftschall mit der Hüllflächenmethode (ISO 8528-10:2022)
Dieses Dokument gilt für von Hubkolben-Verbrennungsmotor mit innerer Verbrennung (RIC, en: Reciprocating Internal Combustion) angetriebene Wechsel- (AC, en: Alternating Current) und Gleichstromerzeugungsaggregate (DC, en: Direct Current) mit konstanter und variabler Drehzahl für feste und mobile Anwendungen mit starrer oder flexibler Befestigung. Es ist anwendbar für die Nutzung an Land und zur See, außer für an Luftfahrzeugen oder zum Antrieb von Landfahrzeugen und Lokomotiven verwendeten Stromerzeugungsaggregaten.
Der Zusammenhang zwischen dieser Europäischen Norm und den grundlegenden Anforderungen der EU Richtlinie 2006/42/EWG wird im Anhang ZA erläutert.
ANMERKUNG 1 Für einige bestimmte Anwendungen (z. B. grundlegende Versorgung für Krankenhäuser, Hochhäuser usw.) können ergänzende Anforderungen erforderlich werden. Die Bestimmungen dieses Dokuments können als Grundlage betrachtet werden.
ANMERKUNG 2 Auf diese Internationale Norm wird im Hinblick auf Geräusch in EN ISO 8528 13 Bezug genommen. EN ISO 8528 13 beinhaltet Anforderungen im Hinblick auf die Konstruktion von Stromerzeugungsaggregaten, Überprüfung von Geräuschniveaus, Informationen mit Bezug zu Geräusch in Betriebs- und Wartungsanleitung.
Groupes électrogènes à courant alternatif entraînés par moteurs alternatifs à combustion interne - Partie 10: Mesurage du bruit aérien (ISO 8528-10:2022)
Le présent document spécifie les codes d’essai acoustique pour la détermination du niveau de puissance acoustique et du niveau de pression acoustique d’émission au poste de travail des groupes électrogènes entraînés par moteurs alternatifs à combustion interne.
Le présent document s’applique aux groupes électrogènes à courant alternatif (CA) et courant continu (CC) entraînés par moteurs alternatifs à combustion interne à vitesse constante et variable, pour installation fixe et mobile à montage rigide ou élastique. Il est applicable aux groupes électrogènes pour des applications terrestres ou marines à l’exclusion des groupes électrogènes utilisés sur les aéronefs ou pour la propulsion des véhicules terrestres et des locomotives.
NOTE 1 Pour des applications particulières (par exemple alimentation principale d’hôpitaux, immeubles de grande hauteur), des exigences supplémentaires peuvent être nécessaires. Les dispositions du présent document peuvent être prises comme une base.
NOTE 2 Le présent document est référencé en ce qui concerne le bruit dans l’ISO 8528‑13:2016, qui contient des exigences concernant la conception des groupes électrogènes, la maîtrise des niveaux de bruit et les informations relatives au bruit dans les instructions de fonctionnement et de maintenance.
Sestavi tokovnih generatorjev, ki jih poganja batni stroj z notranjim zgorevanjem - 10. del: Meritev hrupa v zraku (ISO 8528-10:2022)
Ta del standarda ISO 8528 določa merilne metode za določanje hrupa v zraku, ki ga oddajajo sestavi generatorjev, ki jih poganja batni stroj z notranjim zgorevanjem, tako da se zadevne skupne emisije hrupa (npr. hrup izpušnih plinov in hladilnega sistema skupaj z vsemi drugimi viri hrupa motorja) ocenijo podobno, da so doseženi primerljivi rezultati.
Uporablja se za sestave tokovnih generatorjev, ki jih poganja batni stroj z notranjim zgorevanjem, za fiksne in mobilne aplikacije s togimi ali fleksibilnimi elementi za pritrditev. Uporablja se na kopnem in v pomorstvu, razen generatorjev za uporabo na letalu ali za pogon kopenskih vozil in lokomotiv.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 8528-10:2023
01-marec-2023
Sestavi tokovnih generatorjev, ki jih poganja batni stroj z notranjim zgorevanjem -
10. del: Meritev hrupa v zraku (ISO 8528-10:2022)
Reciprocating internal combustion engine driven alternating current generating sets -
Part 10: Measurement of airborne noise (ISO 8528-10:2022)
Stromerzeugungsaggregate mit Hubkolben-Verbrennungsmotor - Teil 10: Messung von
Luftschall mit der Hüllflächenmethode (ISO 8528-10:2022)
Groupes électrogènes à courant alternatif entraînés par moteurs alternatifs à combustion
interne - Partie 10: Mesurage du bruit aérien (ISO 8528-10:2022)
Ta slovenski standard je istoveten z: EN ISO 8528-10:2022
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
27.020 Motorji z notranjim Internal combustion engines
zgorevanjem
29.160.40 Električni agregati Generating sets
SIST EN ISO 8528-10:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 8528-10:2023
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SIST EN ISO 8528-10:2023
EN ISO 8528-10
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2022
EUROPÄISCHE NORM
ICS 17.140.20; 27.020; 29.160.40
English Version
Reciprocating internal combustion engine driven
alternating current generating sets - Part 10: Measurement
of airborne noise (ISO 8528-10:2022)
Groupes électrogènes à courant alternatif entraînés par Stromerzeugungsaggregate mit Hubkolben-
moteurs alternatifs à combustion interne - Partie 10: Verbrennungsmotor - Teil 10: Messung von Luftschall
Mesurage du bruit aérien (ISO 8528-10:2022) mit der Hüllflächenmethode (ISO 8528-10:2022)
This European Standard was approved by CEN on 1 October 2022.
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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8528-10:2022 E
worldwide for CEN national Members.
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SIST EN ISO 8528-10:2023
EN ISO 8528-10:2022 (E)
Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this document and the essential
requirements of Directive 2006/42/EC aimed to be covered . 4
2
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SIST EN ISO 8528-10:2023
EN ISO 8528-10:2022 (E)
European foreword
This document (EN ISO 8528-10:2022) has been prepared by Technical Committee ISO/TC 70 "Internal
combustion engines" in collaboration with Technical Committee CEN/TC 270 “Internal combustion
engines” 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 June 2023, and conflicting national standards shall be
withdrawn at the latest by June 2023.
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 has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For the relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral
part of this document.
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 8528-10:2022 has been approved by CEN as EN ISO 8528-10:2022 without any
modification.
3
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SIST EN ISO 8528-10:2023
EN ISO 8528-10:2022 (E)
Annex ZA
(informative)
Relationship between this document and the essential requirements of
Directive 2006/42/EC aimed to be covered
This document has been prepared under a Commission’s standardization request “M/396 Mandate to
CEN and CENELEC for Standardisation in the field of machinery” to provide one voluntary means of
conforming to essential requirements of Directive 2006/42/EC of the European Parliament and of the
Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast).
Once this document is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this document given in Table ZA.1 confers, within the limits of
the scope of this document, a presumption of conformity with the corresponding essential
requirements of that Directive, and associated EFTA regulations.
Table ZA.1 — Correspondence between this document and Annex I of Directive 2006/42/EC
The relevant Essential Clause(s)/subclause(s) of this Remarks/Notes
Requirements of document
Directive 2006/42/EC
1.7.4.2. (u) 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this document is
maintained in the list published in the Official Journal of the European Union. Users of this document
should consult frequently the latest list published in the Official Journal of the European Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this document.
4
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SIST EN ISO 8528-10:2023
INTERNATIONAL ISO
STANDARD 8528-10
Second edition
2022-10
Reciprocating internal combustion
engine driven alternating current
generating sets —
Part 10:
Measurement of airborne noise
Groupes électrogènes à courant alternatif entraînés par moteurs
alternatifs à combustion interne —
Partie 10: Mesurage du bruit aérien
Reference number
ISO 8528-10:2022(E)
© ISO 2022
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SIST EN ISO 8528-10:2023
ISO 8528-10:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
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 2022 – All rights reserved
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SIST EN ISO 8528-10:2023
ISO 8528-10:2022(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols . 3
5 Selection of the most appropriate method. 4
5.1 General . 4
5.2 Sound power level measurements accuracy grades . 5
5.2.1 General . 5
5.2.2 Engineering grade (grade 2). 5
5.2.3 Survey grade (grade 3) . 5
6 Measuring equipment . 6
6.1 General . 6
6.2 Calibration . 6
7 Measuring environment .6
7.1 General . 6
7.2 V erification of acoustic adequacy of test environment . 6
7.3 Criteria for background noise . 6
8 Definition of noise source and operating conditions of the generating set .6
8.1 Definition of noise source under test . 6
8.2 Location, installation of the generating set . 7
8.3 Mounting of the generating set . 7
8.4 Operation of the generating set during test . 7
9 Reference box and measurement surface . 8
9.1 Reference box. 8
9.2 Determination of the reference box in special cases . 8
9.2.1 Elevated generating set on a trailer or trolley kit . 8
9.2.2 Generating set with extended exhaust device . 8
9.2.3 Generating set with auxiliary equipment . 9
9.3 Measurement surface . 9
9.3.1 General . 9
9.3.2 Microphone orientation . 9
9.3.3 Hemispherical measurement surface . 10
9.3.4 Parallelepiped measurement surface . 10
9.3.5 Reduction in the number of microphone positions . 10
10 Measurement of sound pressure levels .10
11 Determination of the A-weighted sound power level .10
11.1 Calculation of mean-time-averaged sound pressure levels . 10
11.2 Corrections for background noise. 10
11.3 Calculation of the surface time-averaged sound pressure levels . 10
11.4 Calculation of sound power levels . 11
11.5 Calculation of apparent surface sound pressure level non-uniformity index . 11
11.6 A-weighted sound power level . 11
12 Measurement uncertainty .11
13 Guaranteed sound power level .11
13.1 General . 11
13.2 Arithmetic mean of sound power levels . 11
13.3 Expanded measurement uncertainty .12
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SIST EN ISO 8528-10:2023
ISO 8528-10:2022(E)
13.4 Coverage factor .12
13.5 Determination of σ . 12
R0
13.6 Determination of σ . 12
omc
13.7 Determination of σ . .13
p
13.8 Calculation of the guaranteed sound power level . 13
14 Test report .13
15 Determination of the emission sound pressure level at the workstation .13
15.1 General .13
15.2 Determination of location of the workstation(s) . 13
15.3 Criteria for the adequacy of the test environment . 14
15.4 Corrections for background noise. 14
15.5 Measured quantity . 14
15.6 Calculation of A-weighted emission sound pressure level . 14
15.7 Normalizing to reference meteorological conditions . 14
15.8 Quantities to be determined .15
15.9 Operation of the generating set . 15
15.10 Microphone positions .15
15.10.1 General .15
15.10.2 Microphone position for a standing operator. 16
15.10.3 Microphone position for a bending, crouching or kneeling operator . 16
15.10.4 Microphone positions if there is no clearly identifiable operator position or
for machines without operator . 16
15.11 Measurement uncertainty . 16
15.12 Test report . 16
Annex A (normative) Application of ISO 3744:2010 for generating sets .17
Annex B (normative) Application of ISO 3746:2010 for generating sets .37
Annex C (informative) Sound intensity methods .41
Bibliography .43
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© ISO 2022 – All rights reserved
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SIST EN ISO 8528-10:2023
ISO 8528-10:2022(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.
This document was prepared by Technical Committee ISO/TC 70, Internal combustion engines, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/
TC 270, Internal combustion engines, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 8528-10:1998), which has been technically
revised.
The main changes are as follows:
— the normative references have been updated;
— the latest requirements of ISO 3744:2010 and ISO 3746:2010 have been included, respecting
ISO 12001:1996 requirements;
— the measurement surfaces have been updated;
— the definition of the reference box in special cases has been added;
— the guaranteed sound power level has been added;
— requirements concerning variable speed engine gensets, fans and lighting towers have been added;
— the requirements for welding generators have been updated;
— the determination of the emission sound pressure level at workstation has been updated.
A list of all parts in the ISO 8528 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.
v
© ISO 2022 – All rights reserved
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SIST EN ISO 8528-10:2023
ISO 8528-10:2022(E)
Introduction
This document specifies noise test codes for determining the basic noise emission descriptors.
For many manufacturers of generating sets, the control of noise is a major issue that requires
effective exchange of acoustical information, in particular on noise emission. The basic noise emission
descriptors are the sound power level of the generating set itself and the emission sound pressure level
at the workstation.
In this context, the main flow of information goes from the manufacturer to the purchaser. However,
installers and users of the generating sets also desire comprehensive information about the generating
sets' ability to generate airborne sound.
Thus, measuring the basic noise emission descriptors allows the generating set manufacturer to
determine, declare and verify the noise emission values.
Therefore, the sound power level, as the major parameter to characterize machines as sound sources,
is determined by measurements. The sound power level is a major parameter because it represents an
intrinsic characteristic of generating sets as noise sources. It is useful, for example, in noise-abatement
programmes or when designing a building where the generating set is intended to be used.
The emission sound pressure level at the workstation is also measured. This enables an assessment of
the risk of exposure to the airborne sound of the operators. This assessment is essential for health and
safety reasons.
In this document, the generating sets are considered as steady noise sources as per ISO 12001:1996.
The generating sets concerned and the extent to which noise is covered are indicated in this document.
This document allows measurements to be made in many different test environments. Clause 5 can be
used as a general guideline to assist in the selection of the right noise test code. The selection mainly
depends on the test environment and the desired grade of accuracy.
This document contains two methodologies for determining the measurement uncertainty. In
Clause 12, the uncertainty U is determined by considering measurements on a single generating set.
In Clause 13, the uncertainty K is determined by considering a batch of generating sets, which can be
useful for control of production purpose.
This document is a C-type standard as stated in ISO 12001:1996. When provisions of this C-type
standard are different from those stated in A or B standards, the provisions of this C-type standard
take precedence.
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© ISO 2022 – All rights reserved
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SIST EN ISO 8528-10:2023
INTERNATIONAL STANDARD ISO 8528-10:2022(E)
Reciprocating internal combustion engine driven
alternating current generating sets —
Part 10:
Measurement of airborne noise
1 Scope
This document specifies noise test codes for determining the sound power level and the emission sound
pressure level at the workstation of reciprocating internal combustion engine driven electrical power
generating sets.
This document applies to constant and variable-speed reciprocating internal combustion (RIC) engine
driven alternating current (AC) and direct current (DC) generating sets for fixed and mobile applications
with rigid or flexible mountings. It is applicable for land and marine use, excluding generating sets used
on aircraft or to propel land vehicles and locomotives.
NOTE 1 For some specific applications (e.g. essential hospital supplies, high-rise buildings) supplementary
requirements can be necessary. The provisions of this document can be regarded as a basis.
NOTE 2 This document is referenced with regard to noise in ISO 8528-13:2016, which contains requirements
concerning the design of generating sets, verification of noise levels and information related to noise in the
operating and maintenance instructions.
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
...
SLOVENSKI STANDARD
oSIST prEN ISO 8528-10:2021
01-maj-2021
Sestavi tokovnih generatorjev, ki jih poganja batni stroj z notranjim zgorevanjem -
10. del: Meritev hrupa v zraku z metodo ovojnih ploskev (ISO/DIS 8528-10:2021)
Reciprocating internal combustion engine driven current generating sets - Part 10:
Measurement of airborne noise by the enveloping surface method (ISO/DIS 8528-
10:2021)
Stromerzeugungsaggregate mit Hubkolben-Verbrennungsmotoren - Teil 10: Messung
der Luftschallemission - Hüllflächenverfahren (ISO/DIS 8528-10:2021)
Groupes électrogènes entraînés par moteurs alternatifs à combustion interne - Partie 10:
Mesurage du bruit aérien par la méthode de la surface enveloppe (ISO/DIS 8528-
10:2021)
Ta slovenski standard je istoveten z: prEN ISO 8528-10
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
27.020 Motorji z notranjim Internal combustion engines
zgorevanjem
29.160.40 Električni agregati Generating sets
oSIST prEN ISO 8528-10:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 8528-10:2021
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oSIST prEN ISO 8528-10:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 8528-10
ISO/TC 70 Secretariat: SAC
Voting begins on: Voting terminates on:
2021-02-16 2021-05-11
Reciprocating internal combustion engine driven current
generating sets —
Part 10:
Measurement of airborne noise by the enveloping
surface method
ICS: 27.020; 17.140.20; 29.160.40
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 8528-10:2021(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 2021
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oSIST prEN ISO 8528-10:2021
ISO/DIS 8528-10:2021
ISO/DIS 8528-10:2021(E)
Contents Page
Foreword . v
1 Introduction . vi
2 Scope . 1
3 Normative references . 1
4 Terms and definitions . 2
5 Symbols . 3
6 Technical characteristics of the ISO 8528-10 . 4
7 Measuring equipment . 5
7.1 General . 5
7.2 Calibration . 5
8 Measuring environment . 5
8.1 General . 5
8.2 Verification of acoustic adequacy of test environment . 6
8.3 Criteria for background noise . 6
9 Definition of noise source and operating conditions of the generating set . 6
9.1 Definition of noise source under test . 6
9.2 Location, installation of the generating set . 7
9.3 Mounting of the generating set . 7
9.4 Operation of the generating set during test . 8
10 Reference box and measurement surface . 8
10.1 Reference box . 8
10.2 Determination of the reference box in special cases . 8
10.2.1 Elevated generating set on a trailer or trolley kit . 8
10.2.2 Generating set with extended exhaust pipe . 8
10.2.3 Generating set with auxiliary equipment . 10
10.3 Measurement surface . 10
10.3.1 General . 10
10.3.2 Microphone orientation . 11
10.3.3 Hemispherical measurement surface . 11
10.3.4 Parallelepiped measurement surface . 11
10.3.5 Reduction in the number of microphone positions . 11
11 Measurement of sound pressure levels . 11
COPYRIGHT PROTECTED DOCUMENT
12 Determination of the A-weighted sound power level. 12
© ISO 2021
12.1 Calculation of mean-time-averaged sound pressure levels . 12
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 12.2 Corrections for background noise . 12
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
12.3 Calculation of the surface time-averaged sound pressure levels . 12
below or ISO’s member body in the country of the requester.
12.4 Calculation of sound power levels . 12
ISO copyright office
12.5 Calculation of apparent surface sound pressure level non-uniformity index . 12
CP 401 • Ch. de Blandonnet 8
12.6 A-weighted sound power level . 12
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
13 Determination of the sound pressure level at workstation . 12
Fax: +41 22 749 09 47
Email: copyright@iso.org
13.1 Determination of location of workstation . 12
Website: www.iso.org
13.2 Determination of A-weighted Sound Pressure Level at the workstation . 13
Published in Switzerland
ii © ISO 2021 – All rights reserved
© ISO 2017 – All rights reserved
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oSIST prEN ISO 8528-10:2021
ISO/DIS 8528-10:2021(E)
Contents Page
Foreword . v
1 Introduction . vi
2 Scope . 1
3 Normative references . 1
4 Terms and definitions . 2
5 Symbols . 3
6 Technical characteristics of the ISO 8528-10 . 4
7 Measuring equipment . 5
7.1 General .5
7.2 Calibration .5
8 Measuring environment . 5
8.1 General .5
8.2 Verification of acoustic adequacy of test environment .6
8.3 Criteria for background noise .6
9 Definition of noise source and operating conditions of the generating set . 6
9.1 Definition of noise source under test .6
9.2 Location, installation of the generating set .7
9.3 Mounting of the generating set .7
9.4 Operation of the generating set during test .8
10 Reference box and measurement surface . 8
10.1 Reference box . 8
10.2 Determination of the reference box in special cases .8
10.2.1 Elevated generating set on a trailer or trolley kit .8
10.2.2 Generating set with extended exhaust pipe .8
10.2.3 Generating set with auxiliary equipment . 10
10.3 Measurement surface . 10
10.3.1 General .10
10.3.2 Microphone orientation . 11
10.3.3 Hemispherical measurement surface . 11
10.3.4 Parallelepiped measurement surface . 11
10.3.5 Reduction in the number of microphone positions . 11
11 Measurement of sound pressure levels . 11
12 Determination of the A-weighted sound power level. 12
12.1 Calculation of mean-time-averaged sound pressure levels . 12
12.2 Corrections for background noise . 12
12.3 Calculation of the surface time-averaged sound pressure levels . 12
12.4 Calculation of sound power levels . 12
12.5 Calculation of apparent surface sound pressure level non-uniformity index . 12
12.6 A-weighted sound power level . 12
13 Determination of the sound pressure level at workstation . 12
13.1 Determination of location of workstation . 12
13.2 Determination of A-weighted Sound Pressure Level at the workstation . 13
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oSIST prEN ISO 8528-10:2021
ISO/DIS 8528-10:2021(E)
14 Measurement uncertainty . 13
15 Guaranteed sound power level . 13
15.1 General . 13
15.2 Arithmetic mean of sound power levels . 14
15.3 Expanded measurement uncertainty . 14
15.4 Coverage factor . 15
15.5 Determination of σR0 . 15
15.6 Determination of σomc . 15
15.7 Determination of σ . 15
p
15.8 Calculation of the guaranteed sound power level . 15
16 Test report . 16
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 17
Annex B (normative) Application of ISO 3744:2010 for generating sets . 19
Annex C (normative) Application of ISO 3746:2010 for generating sets . 45
Annex D (informative) Sound intensity methods . 49
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oSIST prEN ISO 8528-10:2021
ISO/DIS 8528-10:2021(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 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 Technical Committee ISO/TC 70, Internal combustion engines.
This second edition cancels and replaces the first (ISO 8528-10:1998) which has been technically revised.
The main changes compared to the previous edition are as follows:
— the normative references have been updated;
— the latest requirements of ISO 3744:2010 and ISO 3746:2010 have been included, respecting ISO
12001:1996 requirements;
— the Annex ZA has been updated;
— the definition of the reference box in special cases has been added;
— the determination of the sound pressure level at workstation has been updated;
— the guaranteed sound power level has been added;
— requirements concerning Variable Speed Engine Gensets, fans and lighting towers have been added;
— the requirements for welding generators have been updated
A list of all parts in the ISO 8528 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.
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oSIST prEN ISO 8528-10:2021
ISO/DIS 8528-10:2021(E)
1 Introduction
This document specifies noise test codes for determining the sound power levels of reciprocating internal
combustion engine driven electrical power generating sets.
For many manufacturers of generating sets, the control of noise is a major issue with effective exchange
of acoustical information in particular on the sources’ noise emission. In this context the main flow of
information goes from the manufacturer to the purchaser. However, also installers and users of the
generating sets are interested to get comprehensive information about the sound sources ability to
generate airborne sound.
Therefore the sound power level, as the major parameter to characterise machines as sound sources,
need to be determined by measurements. The sound power level is a major parameter because it
represents an intrinsic characteristic of generating sets as noise sources, that is independent of the
environment in which it is installed.
Measuring the sound power level allows the generating sets manufacturer to determine, declare and
verify the noise emission values.
In this document the sound power level is determined by using sound pressure level that is measured
over a measurement surface enclosing the generating set. Generating sets are considered as steady noise
sources as per ISO 12001:1996. The generating sets concerned and the extent to which noise is covered
are indicated in this document. This document allows to make measurements in a lot of different test
environments. Table 1 can be used as general guideline to assist in the selection of the right noise test
code. The selection mainly depends on the test environment, and the desired grade of accuracy.
This document is C-type standard as stated in ISO 12001:1996. When provisions of this C-type standard
are different from those which are stated in A or B standards, the provisions of this C-type standard take
precedence.
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oSIST prEN ISO 8528-10:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 8528-10:2021(E)
Reciprocating internal combustion engine driven current generating sets —
Part 10: Measurement of airbone noise by the enveloping surface method
2 Scope
This document applies to constant and variable speed Reciprocating Internal Combustion (RIC) engine driven
Alternating Current (AC) and Direct Current (DC) generating sets for fixed and mobile applications with rigid or
flexible mountings. It is applicable for land and marine use, excluding generating sets used on aircraft or to propel
land vehicles and locomotives.
The relationship between this standard and the essential requirements of European Directive 2006/42/EC are
detailed in the Annex ZA.
NOTE 1 For some specific applications (e. g. essential hospital supplies, high rise buildings, etc.) supplementary
requirements can be necessary. The provisions of this document can be regarded as a basis.
NOTE 2 This international standard is referred in the EN ISO 8528-13 with regard to noise. EN ISO 8528-13 contains
requirements concerning the design of generating sets, verification of noise levels, information related to noise in the
operating and maintenance instructions.
3 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 3046-1, Reciprocating internal combustion engines — Performance — Part 1: Standard reference conditions,
declarations of power, fuel and lubricating oil consumptions and test methods
ISO 8528-1, Reciprocating internal combustion engine driven alternating current generating sets — Part 1:
Application, ratings and performance
ISO 8528-2, Reciprocating internal combustion engine driven alternating current generating sets — Part 2: Engines
ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources using
sound pressure — Engineering methods for an essentially free field over a reflecting plane
ISO 3746:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources using
sound pressure — Survey method using an enveloping measurement surface over a reflecting plane
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oSIST prEN ISO 8528-10:2021
ISO/DIS 8528-10:2021(E)
ISO 9614-1:1993, Acoustics — Determination of sound power levels of noise sources using sound intensity — Part
1: Measurement at discrete points
ISO 9614-2:1996, Acoustics — Determination of sound power levels of noise sources using sound intensity — Part
2: Measurement by scanning
ISO 15619:2013, Reciprocating internal combustion engines - Measurement method for exhaust silencers - Sound
power level of exhaust noise and insertion loss using sound pressure and power loss ratio
IEC 61672-1, Electroacoustics – Sound level meters – Part 1 : specifications
IEC 61260, Electroacoustics. Octave-band and fractional-octave-band filters.
IEC 60942, Electroacoustics - Sound calibrators
IEC 60974-1, Arc welding equipment - Part 1: Welding power sources
4 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 3046-1, ISO 8528-1 and ISO 8528-2
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
For acoustics, terms and definitions of ISO 3744:2010 applicable to generating sets are indicated in Table B.1;
terms and definitions of ISO 3746:2010 applicable to generating sets are indicated in Table C.1.
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oSIST prEN ISO 8528-10:2021
ISO/DIS 8528-10:2021(E)
5 Symbols
d Characteristic source dimension, in meters
O
d Measurement distance, in meters
r Measurement radius, in meters
S Measurement surface, in square meters
p Sound pressure, in pascals
i Subscript denoting a particular measuring point
𝐿𝐿 Sound pressure level, in decibels
𝑝𝑝
T Measurement time interval, in seconds
𝐿𝐿 Time-averaged sound pressure level, in decibels
𝑝𝑝,𝑇𝑇
𝐿𝐿 Time-averaged sound pressure level, for the ith microphone position on the measurement surface, in
𝑝𝑝𝑝𝑝,𝑇𝑇
decibels
K A-weighted background noise correction, in decibels
1A
K A-weighted environmental correction, in decibels
2A
���
𝐿𝐿 Surface time-averaged sound pressure level, in decibels
𝑝𝑝
𝐿𝐿 Sound power level, in decibels
𝑊𝑊
𝐿𝐿 A-weighted sound power level, in decibels
𝑊𝑊A
∗
𝐷𝐷 Apparent directivity index, in decibels
I𝑝𝑝
∗
𝑉𝑉 Apparent surface sound pressure level non-uniformity index, in dec
...
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