EN 60704-3:2019

Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 3: Procedure for determining and verifying declared noise emission values

IEC 60704-3:2019 is available as IEC 60704-3:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60704-3:2019 describes procedures for determining and verifying the declared values of the noise emitted by household and similar appliances. It applies to all categories of household and similar electrical appliances covered by IEC 60704-1 and all parts of IEC 60704-2, which include particular requirements for special categories of appliances. It applies to appliances being produced in quantity, such as in batches, series or lots, which are manufactured to the same technical specification and characterized by the same declared value of noise emission. This part of IEC 60704: – considers the term "declaration" to include all means for providing information on the noise emission values to potential users (consumers) of the appliances; this includes labels, brochures, advertisements, commercial and technical information papers, etc.; – considers the declaration for appliances manufactured by mass production; – specifies a simple statistical method for verifying the declared values by investigating a sample of only three appliances. This International Standard is to be used in conjunction with IEC 60704-1:2010 and the latest edition of IEC 60704-2 (all parts). This third edition cancels and replaces the second edition published in 2006. This edition constitutes a technical revision. It includes the following significant technical changes with respect to the previous edition: a) in Annex A, standard deviations that are now specified for various appliance categories in the parts of IEC 60704-2 have been excluded from Table A.1; b) furthermore, this edition makes reference to new standards and is implementing ISO/IEC Directives, Part 2 in a more accurate manner.

Elektrische Geräte für den Hausgebrauch und ähnliche Zwecke - Prüfvorschrift für die Bestimmung der Luftschallemission - Teil 3: Verfahren zur Bestimmung und Nachprüfung angegebener Geräuschemissionswerte

Appareils électrodomestiques et analogues - Code d'essai pour la détermination du bruit aérien - Partie 3: Méthode de détermination et de vérification des valeurs déclarées d'émission sonore

IEC 60704-3:2019 est disponible sous forme de IEC 60704-3:2019 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60704-3:2019 décrit les méthodes de détermination et de vérification des valeurs déclarées du bruit émis par les appareils domestiques et analogues. Elle s'applique à toutes les catégories d'appareils à usage domestique et analogue couverts par l'IEC 60704-1 et toutes les parties de l'IEC 60704-2, qui contiennent des exigences particulières applicables à certaines catégories d'appareils. Elle s'applique aux appareils produits en quantité (en série, en lots) fabriqués suivant les mêmes spécifications techniques et caractérisés par la même valeur déclarée d'émission sonore. La présente partie de l'IEC 60704: – utilise le terme "déclaration" pour englober tous les moyens utilisés pour fournir des informations sur les valeurs d'émission sonore aux utilisateurs potentiels (consommateurs) des appareils; ce terme inclut les étiquettes, les notices, les publicités, les fiches techniques et commerciales d'information, etc.; – traite de la déclaration pour des appareils fabriqués en série; – décrit une méthode statistique simple pour vérifier les valeurs déclarées en étudiant un échantillon limité à trois appareils. Cette Norme internationale doit être utilisée conjointement avec l'IEC 60704-1:2010 et la dernière édition de l'IEC 60704-2 (toutes les parties). Cette troisième édition annule et remplace la deuxième édition parue en 2006. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) dans l'Annexe A, les écarts-types qui sont à présent spécifiés pour différentes catégories d'appareils dans les parties de l'IEC 60704-2 ont été exclus du Tableau A.1; b) en outre, cette édition fait référence à de nouvelles normes et met en application les Directives ISO/IEC, Partie 2 d'une manière plus précise.

Gospodinjski in podobni električni aparati - Preskuševalni kod za ugotavljanje zvočnega hrupa v zraku - 3. del: Postopek za ugotavljanje in potrjevanje določene ravni emisije hrupa

Ta standard opisuje postopke za ugotavljanje in potrjevanje vrednosti hrupa, ki ga oddajajo gospodinjski in podobni električni aparati. Uporablja se za vse kategorije gospodinjskih in podobnih električnih aparatov, ki jih zajema standard IEC 60704-1 in vsi deli standarda IEC 60704-2, ki vključujejo posebne zahteve za posebne kategorije aparatov. Uporablja se za aparate v večjih količinah, kot so svežnji, serije ali loti, ki so izdelani po isti tehnični specifikaciji in za katere je značilno, da imajo enako raven emisije hrupa. Ta del standarda IEC 60704: – predvideva, da izraz »deklaracija« vključuje vsa sredstva za zagotavljanje informacij o vrednostih emisij hrupa potencialnim uporabnikom (potrošnikom) aparatov; to vključuje nalepke, brošure, oglase, komercialne in tehnične informativne dokumente itd.; – upošteva deklaracijo za aparate, izdelane v množični proizvodnji; – določa preprosto statistično metodo za preverjanje prijavljenih vrednosti s preiskavo vzorca samo treh aparatov.

General Information

• Status: Published
• Publication Date: 08-Aug-2019
• Withdrawal Date: 01-Jul-2022
• ICS: 17.120.20 - Flow in open channels
• ICS: 97.040 - Kitchen equipment
• Technical Committee: CLC/TC 59X - Consumer information related to household electrical appliances
• Drafting Committee: IEC/TC 59 - IEC_TC_59
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 09-Aug-2019
• Completion Date: 09-Aug-2019
• Ref Project: SIST EN 60704-3:2019 - Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 3: Procedure for determining and verifying declared noise emission values

Relations

• Replaces: EN 60704-3:2006 - Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 3: Procedure for determining and verifying declared noise emission values
• Effective Date: 23-Jan-2023

Overview

EN 60704-3:2019 (adoption of IEC 60704-3:2019) is the test code for determining and verifying declared airborne acoustical noise values of household and similar electrical appliances. It defines procedures for measuring, calculating and verifying the noise emission values that manufacturers declare to users (labels, brochures, advertisements, technical sheets). The standard applies to appliances covered by IEC 60704‑1 and the parts of IEC 60704‑2 that include category‑specific requirements, and is intended for mass‑produced items manufactured to the same technical specification.

Key topics

• Scope and applicability
  • Applies to appliances produced in batches, series or lots with the same declared noise emission value.
  • To be used in conjunction with IEC 60704‑1:2010 and the latest IEC 60704‑2 parts.
• Procedures for determination and verification
  • Specifies methods for calculating declared sound power/noise emission values and for verifying those declarations.
  • Includes a simple statistical verification method that can be applied using a sample of three appliances.
• Declaration and presentation
  • Considers “declaration” broadly (labels, brochures, adverts, commercial/technical papers) and gives guidance on presenting noise values.
• Statistical and technical references
  • References statistical standards (e.g., ISO 3534, ISO 7574 series) and provides normative annexes with standard deviations by appliance category (Annex A) and worked examples (Annexes B and C).
• Edition changes & EU alignment
  • Third edition (2019) supersedes 2006 version and updates normative references and editorial alignment with ISO/IEC Directives.
  • CENELEC common modifications caution about differences between the standard’s statistical approach and specific EU regulations on energy labelling/ecodesign (e.g., Regulation (EU) 2017/1369, Delegated Regulation 65/2014, Regulations 2016/2282 and 2017/254). Clause 5.1 is not applicable where EU verification rules govern.

Applications

Who uses EN 60704‑3:2019:

• Manufacturers - to determine and declare noise emission data for product information and marketing.
• Test laboratories - to perform measurements and statistical verification of declared noise values.
• Certification & conformity bodies - to assess manufacturer declarations (noting EU regulatory exceptions).
• Acoustic and product design engineers - to compare product noise performance and improve designs.
• Regulatory authorities and compliance teams - to interpret declared values relative to labelling and ecodesign requirements.

Practical benefits:

• Standardized, repeatable procedure for measuring and reporting appliance noise.
• Efficient verification workflow for mass production using small sample sizes.
• Clear linkage between measurement practice and consumer information.

Related standards

• IEC 60704‑1:2010 (General requirements)
• IEC 60704‑2 series (Particular requirements for appliance categories)
• ISO 3534, ISO 7574 series (statistical methods)
• Relevant EU regulations on energy labelling and ecodesign (see Official Journal of the European Union)

Keywords: EN 60704-3:2019, IEC 60704-3:2019, household appliances, noise emission, sound power, airborne acoustical noise, verification, declaration, test code, energy labelling, ecodesign.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2019
Nadomešča:
SIST EN 60704-3:2006
Gospodinjski in podobni električni aparati - Preskuševalni kod za ugotavljanje
zvočnega hrupa v zraku - 3. del: Postopek za ugotavljanje in potrjevanje določene
ravni emisije hrupa
Household and similar electrical appliances - Test code for the determination of airborne
acoustical noise - Part 3: Procedure for determining and verifying declared noise
emission values
Elektrische Geräte für den Hausgebrauch und ähnliche Zwecke - Prüfvorschrift für die
Bestimmung der Luftschallemission - Teil 3: Verfahren zur Bestimmung und
Nachprüfung angegebener Geräuschemissionswerte
Appareils électrodomestiques et analogues - Code d'essai pour la détermination du bruit
aérien - Partie 3: Procédure pour déterminer et vérifier l'annonce des valeurs d'émission
acoustique
Ta slovenski standard je istoveten z: EN 60704-3:2019
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
97.030 Električni aparati za dom na Domestic electrical
splošno appliances in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60704-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2019
ICS 17.120.20; 97.040
Supersedes EN 60704-3:2006 and all of its
amendments and corrigenda (if any)
English Version
Household and similar electrical appliances - Test code for the
determination of airborne acoustical noise - Part 3: Procedure for
determining and verifying declared noise emission values
(IEC 60704-3:2019 , modified)
Appareils électrodomestiques et analogues - Code d'essai Elektrische Geräte für den Hausgebrauch und ähnliche
pour la détermination du bruit aérien - Partie 3: Méthode de Zwecke - Prüfvorschrift für die Bestimmung der
détermination et de vérification des valeurs déclarées Luftschallemission - Teil 3: Verfahren zur Bestimmung und
d'émission sonore Nachprüfung angegebener Geräuschemissionswerte
(IEC 60704-3:2019 , modifiée) (IEC 60704-3:2019 , modifiziert)
This European Standard was approved by CENELEC on 2019-07-02. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60704-3:2019 E
European foreword
The text of document 59/675/CDV, future edition 3 of IEC 60704-3, prepared by IEC/TC 59 "Performance
of household electrical appliances" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 60704-3:2019.
A draft amendment, which covers common modifications to IEC 60704-3 (59/675/CDV), was prepared by
CLC/TC 59X "Performance of household and similar electrical appliances" and approved by CENELEC.
The following dates are fixed:
• latest date by which this document has (dop) 2020-07-02
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2022-07-02
standards conflicting with this
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60704-3:2019 was approved by CENELEC as a European
Standard with agreed common modifications.
COMMON MODIFICATIONS
Introduction
Add the following paragraph:
Requirements on noise are requested in European delegated regulations supplementing Regulation (EU)
2017/1369 and regulations implementing EU Directive on ecodesign (2009/125/EC). Verification of noise
is set out in these regulations also. Commission delegated regulation (EU) 2017/254 and Commission
regulation (EU) 2016/2282 set out requirements on the use of tolerances in verification procedures.
These requirements are different from the statistical approach laid down in standard IEC 60704-3:2019.
Therefore, there is an addition to Clause 5.1. For determination purpose Clause 6 provides an option.
Caution is to be taken as the statistical approach is not aligned with requirements set out in the EU
regulations on verification.
5 Verification of declared noise emission values
5.1 Basis of the procedure
Add a paragraph at top of this clause as follows:

For verification of declared noise emission values related to EU regulations on energy labelling and
ecodesign this clause is not applicable. The criteria for pass and fail are laid down in these regulations.

NOTE Applicable EU regulations are available at Official Journal of the European Union.

Example “The determined value shall not exceed the declared value of LWA.”, see Commission Delegated
Regulation (EU) No 65/2014 on range hoods, Annex VIII.

6 Determination of noise emission values for declaration
6.1 Determination procedure
Add the following paragraph:
Caution shall be taken when applying the method described in 6.2 and 6.3 for the purpose of declaration
of sound power values for EU energy labelling and proofing compliance with EU requirements on
ecodesign. Paragraphs 6.2 and 6.3 are describing a statistical procedure for the determination of noise
which is aligned with the statistical verification procedure detailed in EN 60704-3:2019, Clause 5.
However, this approach does not fit with the requirements set out in said EU regulations.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the

relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60704-1 2010 Household and similar electrical appliances - EN 60704-1 2010
Test code for the determination of airborne
noise - Part 1: General requirements
+A11 2012
IEC 60704-2 series Household and similar electrical appliances - EN 60704-2 series
Test code for the determination of airborne
acoustical noise
ISO 3534-1 2006 Statistics - Vocabulary and symbols - Part 1: - -
General statistical terms and terms used in
probability
ISO 7574-1 1985 Acoustics - Statistical methods for EN 27574-1 1988
determining and verifying stated noise
emission values of machinery and
equipment - Part 1: General considerations
and definitions
ISO 7574-4 1985 Acoustics - Statistical methods for EN 27574-4 1988
determining and verifying stated noise
emission values of machinery and
equipment - Part 4: Methods for stated
values for batches of machines

Bibliography
Add the following publications

DIRECTIVE 2009/125/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 21 October
2009 establishing a framework for the setting of ecodesign requirements for energy-related products

REGULATION (EU) 2017/1369 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 4 July
2017 setting a framework for energy labelling and repealing Directive 2010/30/EU

COMMISSION DELEGATED REGULATION (EU) No 65/2014 of 1 October 2013 supplementing Directive
2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of domestic
ovens and range hoods
COMMISSION REGULATION (EU) 2016/2282 of 30 November 2016 amending Regulations (.) with
regard to the use of tolerances in verification procedures

COMMISSION DELEGATED REGULATION (EU) 2017/254 of 30 November 2016 amending Delegated
Regulations (…) with regard to the use of tolerances in verification procedures

IEC 60704-3 ®
Edition 3.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Test code for the determination

of airborne acoustical noise –

Part 3: Procedure for determining and verifying declared noise emission values

Appareils électrodomestiques et analogues – Code d'essai pour la

détermination du bruit aérien –

Partie 3: Méthode de détermination et de vérification des valeurs déclarées

d'émission sonore
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.20; 97.030 ISBN 978-2-8322-6975-6

– 2 – IEC 60704-3:2019 © IEC 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and calculations . 6
3.1 Terms and definitions . 6
3.2 Calculations . 11
4 General . 12
4.1 Test method . 12
4.2 Values and symbols . 12
4.3 Reference standard deviation . 13
5 Verification of declared noise emission values . 13
5.1 Basis of the procedure . 13
5.2 Verification procedure . 14
6 Determination of noise emission values for declaration . 14
6.1 Basis of the procedure . 14
6.2 Determination procedure . 14
6.3 Presentation of noise emission values . 14
Annex A (normative) Noise emission of household appliances – Standard deviations . 16
Annex B (informative) Verification of noise emission values – Examples . 17
B.1 Example 1 . 17
B.2 Example 2 . 17
Annex C (informative) Determination of noise emission values – Examples . 18
C.1 Example 1 . 18
C.2 Example 2 . 18
C.3 Example 3 . 19
Bibliography . 20

Figure 1 – Quantile of the standardized distribution . 13

Table A.1 – Standard deviation . 16
Table C.1 – Calculated noise emission values as a function of the total standard
deviation σ and the probability of acceptance P as assumed by the labeller . 18
t a
IEC 60704-3:2019 © IEC 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION OF AIRBORNE
ACOUSTICAL NOISE –
Part 3: Procedure for determining and verifying
declared noise emission values

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC
Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60704-3 has been prepared by IEC technical committee 59:
Performance of household electrical appliances.
IEC 60704-1:2010 has served as a basis for the elaboration of this standard.
This third edition cancels and replaces the second edition published in 2006. This edition
constitutes a technical revision. It includes the following significant technical changes with
respect to the previous edition:
a) in Annex A, standard deviations that are now specified for various appliance categories in
the parts of IEC 60704-2 have been excluded from Table A.1;
b) furthermore, this edition makes reference to new standards and is implementing
ISO/IEC Directives, Part 2 in a more accurate manner.
Standard deviations specified in part 2 documents of the IEC 60704 series supersede the
values given in Table A.1.
– 4 – IEC 60704-3:2019 © IEC 2019
The text of this International Standard is based on the following documents:
CDV Report on voting
59/675/CDV 59/680A/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This International Standard is to be used in conjunction with IEC 60704-1:2010 and the latest
edition of IEC 60704-2 (all parts).
A list of all parts in the IEC 60704 series, published under the general title Household and
similar electrical appliances – Test code for the determination of airborne acoustical noise,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.

IEC 60704-3:2019 © IEC 2019 – 5 –
INTRODUCTION
A comprehensive and correct declaration of noise emission is very helpful to enable the
potential buyer to make a good choice between appliances of the same category (serving for
the same purpose) of different makes or for different models.
In order to ensure a correct declaration of noise emission values, this part of IEC 60704
describes a simple method for verifying declared values and provides information for
determining the noise emission values.
Different countries are implementing different market surveillance strategies. This document
is not implementing a mandatory market surveillance strategy.

– 6 – IEC 60704-3:2019 © IEC 2019
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION OF AIRBORNE
ACOUSTICAL NOISE –
Part 3: Procedure for determining and verifying
declared noise emission values

1 Scope
This part of IEC 60704 describes procedures for determining and verifying the declared
values of the noise emitted by household and similar appliances.
It applies to all categories of household and similar electrical appliances covered by
IEC 60704-1 and all parts of IEC 60704-2, which include particular requirements for special
categories of appliances.
It applies to appliances being produced in quantity, such as in batches, series or lots, which
are manufactured to the same technical specification and characterized by the same declared
value of noise emission.
This part of IEC 60704:
– considers the term "declaration" to include all means for providing information on the noise
emission values to potential users (consumers) of the appliances; this includes labels,
brochures, advertisements, commercial and technical information papers, etc.;
– considers the declaration for appliances manufactured by mass production;
– specifies a simple statistical method for verifying the declared values by investigating a
sample of only three appliances.
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.
IEC 60704-1:2010, Household and similar electrical appliances – Test code for the
determination of airborne acoustical noise – Part 1: General requirements
IEC 60704-2 (all parts), Household and similar electrical appliances – Test code for the
determination of airborne acoustical noise – Part 2: Particular requirements
ISO 3534-1:2006, Statistics – Vocabulary and symbols – Part 1: Probability and general
statistical terms
ISO 7574-4:1985, Acoustics – Statistical methods for determining and verifying stated noise
emission values of machinery and equipment – Part 4: Methods for stated values for batches
of machines
3 Terms, definitions and calculations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60704-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
IEC 60704-3:2019 © IEC 2019 – 7 –
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
sound power level
L
W
ten times the logarithm to the base 10 of the ratio of the sound power of a source to the
reference sound power, expressed in decibels
−12
Note 1 to entry: The reference sound power is 1 pW (10 W). The frequency weighting, or the midband
frequency of the frequency band used, is indicated in the symbol.
Note 2 to entry: For example, the A-weighted sound power level is L .
WA
3.1.2
A-weighted sound power level
L
WA
sound power level of an appliance, determined according to the appropriate requirements
specified in IEC 60704-1 and the relevant part of IEC 60704-2
Note 1 to entry: Henceforth, the subscript is left out for reasons of simplicity.
WA
3.1.3
noise emission value
single value of the noise emission quantity
3.1.4
measured value
L
i
noise emission value for an individual appliance determined in accordance with the
appropriate requirements of IEC 60704
3.1.5
family of appliances
category of appliances
appliances of simila
...