IEC 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.

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.

General Information

• Status: Published
• Publication Date: 27-May-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 97.030 - Domestic electrical appliances in general
• Technical Committee: TC 59 - Performance of household and similar electrical appliances
• Current Stage: PPUB - Publication issued
• Completion Date: 28-May-2019

Standards Content (Sample)

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
IEC 60704-3:2019-05(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
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

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 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
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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

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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.
---------------------- Page: 5 ----------------------
– 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.

---------------------- Page: 6 ----------------------
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.
---------------------- Page: 7 ----------------------
– 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:
---------------------- Page: 8 ----------------------
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

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 .
3.1.2
A-weighted sound power level

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.

3.1.3
noise emission value
single value of the noise emission quantity
3.1.4
measured value

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 similar design or type, or intended to perform the same functions

[SOURCE: ISO 7574-1:1985, 3.5, modified – The notes have been deleted, "category of

appliances" has been added as a preferred term, "machines" has been replaced by

"appliances" in the term and in the definition, and "or equipment" has been deleted from the

definition.]
3.1.6
declared value

value of the noise emission quantity which is rounded to the nearest decibel stated for all

appliances of a complete series of production or of a batch thereof, when the appliances are

new

Note 1 to entry: The declared value indicates the upper statistical value below which a specified large proportion

of noise emission values of the relevant batch lies. L depends on the specified verification procedure, which is

designed such that there is a probability of acceptance of 95 % for the batch, when no more than 6,5 % of all noise

emission values exceeds L , and if the specified reference standard deviations σ equals the actual total standard

c M
deviation σ .

[SOURCE: ISO 7574-1:1985, 3.6, modified – The term "stated value; labelled value" has been

replaced by "declared value"; the first sentence has been rephrased to "which is rounded to

the nearest decibel stated for all appliances of a complete series of production or of a batch

thereof" and "when the appliances are new" has been added; the second sentence has been

deleted; the fact "are new" is integrated in first sentence and notes 1 and 2 have been

replaced by a Note 1 to entry.]
---------------------- Page: 9 ----------------------
– 8 – IEC 60704-3:2019 © IEC 2019
3.1.7
declaration

statement of the declared value, L , which is included in brochures, advertisements, product

or commercial literature and/or affixed to an appliance or part thereof for providing information

on the noise emission values to potential users (buyers, consumers) of the appliance

Note 1 to entry: The term "labeller" is used in this document for a person making declarations.

[SOURCE: ISO 7574-1:1985, 3.7, modified – The term "label" has been replaced by

"declaration", "brochures, advertisements, or commercial literature" have been added, the

phrase after "and/or affixed" has been replaced by "to an appliance or part thereof for

providing information on the noise emission values to potential users (buyers, consumers) of

the appliance" and Note 1 to entry has been added.]
3.1.8
batch of appliances

group of the same family produced in quantity, manufactured to the same technical

specifications and characterized by the same declared value, L

Note 1 to entry: A batch may be either an entire production series or a portion thereof.

[SOURCE: ISO 7574-1:1985, 3.8, modified – The term "batch (lot) of machines" has been

replaced by "batch of appliances" and the note has been transferred into Note 1 to entry.]

3.1.9
size of the batch
size of the population

number of items (appliances in the batch or noise emission values in the population) of the

batch (or of the population)

[SOURCE: ISO 7574-1:1985, 3.9, modified – The term "size of the population" has been

explicitely added as a preferred term, word "machines" is replaced by "appliances" and

phrase "of the batch (or of the population)" is added.]
3.1.10
sample

one or more appliances (or measured values) randomly selected from a lot (or population)

[SOURCE: ISO 7574-1:1985, 3.10, modified – "Machines" is replaced by "appliances".]

3.1.11
size of the sample
number of items in the sample
[SOURCE: ISO 7574-1:1985, 3.11].
3.1.12
arithmetic mean of a batch
arithmetic mean of a population

sum of the noise emission values in a batch (or in a population) divided by the size of the

batch (or of the population)

[SOURCE: ISO 7574-1:1985, 3.12, modified – The term "arithmetic mean of a population"

has been explicitly added and the formula has been deleted.]
3.1.13
arithmetic mean of a sample
sum of the measured values, L , in a sample divided by the size of the sample
---------------------- Page: 10 ----------------------
IEC 60704-3:2019 © IEC 2019 – 9 –

Note 1 to entry: The arithmetic mean value of the sample, is used as an estimator of the mean value of a batch

(or of a population), µ.
[SOURCE: ISO 7574-1:1985, 3.13, modified – The formula has been deleted and the
explanation has been transferred to Note 1 to entry.]
3.1.14
standard deviation of a batch
standard deviation of a population

standard deviation of the noise emission values of the batch (or of the population)

[SOURCE: ISO 7574-1:1985, 3.14, modified – The phrase "of size N is given by the equation"

and the related formula have been deleted.]
3.1.15
standard deviation of a sample
standard deviation of the noise emission values of the sample

Note 1 to entry: The standard deviation of the sample, s, is used as an estimator of the standard deviation of a

batch (or of a population), σ.

[SOURCE: ISO 7574-1:1985, 3.15, modified – Phrase "of the noise emission" has been added,

formula has been deleted and the explanation has been transferred to Note 1 to entry.]

3.1.16
standard deviation of repeatability

standard deviation of noise emission values obtained under repeatability conditions, that is

the repeated application of the same noise emission measurement method on the same noise

source within a short interval of time under the same conditions (same laboratory, same

operator, same measuring equipment)

Note 1 to entry: Values for the standard deviation of repeatability, σ , obtained in practice, are given in Annex A.

[SOURCE: ISO 7574-1:1985, 3.16, modified – The phrase "same apparatus" has been

replaced by "same measurement equipment", reference to ISO 5725 has been deleted and

Note 1 to entry has been added.]
3.1.17
standard deviation of reproducibility

standard deviation of noise emission values obtained under reproducibility conditions, that is

the repeated application of the same noise emission measurement method on the same noise

source at different times and under different conditions (different laboratory, different operator,

different measuring apparatus)

Note 1 to entry: The standard deviation of reproducibility includes the standard deviation of repeatability

(see 3.1.16).

Note 2 to entry: Estimates of the standard deviation of reproducibility, σ , obtained in practice, are given in

Annex A.

[SOURCE: ISO 7574-1:1985, 3.17, modified – The reference to ISO 5725 has been deleted,

the second sentence has been transferred to Note 1 to entry and Note 2 to entry has been

added.]
3.1.18
standard deviation of production

standard deviation of noise emission values obtained on different appliances from batches of

the same category (family), using the same noise emission measurement method under

repeatability conditions (same laboratory, same operator, same measuring apparatus)

---------------------- Page: 11 ----------------------
– 10 – IEC 60704-3:2019 © IEC 2019

Note 1 to entry: Estimates of the standard deviation of production, σ , obtained in practice, are given in Annex A.

[SOURCE: ISO 7574-1:1985, 3.18, modified – Phrase at the beginning has been replaced by

"of noise emission values obtained on different appliances from batches of the same category

(family)", the note has been deleted and Note 1 to entry has been added.]
3.1.19
total standard deviation

square root of the sum of the squares of the standard deviation of reproducibility (see 3.1.17)

and of the standard deviation of production (see 3.1.18)

Note 1 to entry: Estimates of the total standard deviation, σ , obtained in practice are given in Annex A.

[SOURCE: ISO 7574-1:1985, 3.19, modified – The formula has been deleted and Note 1 to

entry has been added.]
3.1.20
reference standard deviation

total standard deviation specified and fixed for the family of appliances under consideration

which is considered to be typical for batches from this family

Note 1 to entry: The use of a fixed σ for each category of appliances enables the application of a statistical

method to deal with small sample sizes.

Note 2 to entry: Values of the reference standard deviation, σ , fixed for the various categories of household

appliances (obtained from practical investigations) are given in Annex A.

[SOURCE: ISO 7574-1:1985, 3.20, modified – The words "and fixed" have been added,

"machines" has been replaced by "appliances", first sentence of note has been transferred to

a Note 1 of entry, remaining part of the note has been deleted and Note 2 to entry has been

added.]
3.1.21
single sampling
type of sampling which consists in taking only one sample from the batch
Note 1 to entry: See ISO 3534-1:2006.

[SOURCE: ISO 7574-1:1985, 3.21, modified – Reference to ISO 3534-1 has been transferred

to Note 1 to entry.]
3.1.22
inspection by variables

method which consists in measuring a quantitative characteristic for each item of a population

or of a sample taken from this population
Note 1 to entry: The quantitative characteristic is the noise emission quantity.
Note 2 to entry: See ISO 3534-1:2006.
[SOURCE: ISO
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