IEC 60704-2-15:2024

Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-15: Particular requirements for household food waste disposers

IEC 60704-2-15:2024 applies to single unit electric food waste disposers for household use, with or without automatic program control, for cold water supply, for permanent connection to water supply and sewage systems, intended for connection to the kitchen sink drain and contained within a kitchen cabinet enclosure. Food waste disposers for restaurants, hotels and industry purposes are excluded. This first edition cancels and replaces the first edition of IEC/PAS 60704-2-15, published in 2008. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to IEC/PAS 60704 2-15:2008:
a) measurement uncertainty and standard deviations have been reviewed;
b) definitions of standard test programme and standard test load have been reviewed;
c) definition of the test enclosure has been reviewed;
d) additional microphone position for test in free field environment;
e) information to be reported has been reviewed;
f) aligned to IEC 60704-1:2021.
This Part 2-15 is intended to be used in conjunction with the fourth edition of IEC 60704-1:2021, Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 1: General requirements.

General Information

• Status: Published
• Publication Date: 19-Sep-2024
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 97.040.50 - Small kitchen appliances
• Technical Committee: SC 59L - Small household appliances
• Drafting Committee: JWG 2 - TC 59/JWG 2
• Current Stage: PPUB - Publication issued
• Start Date: 20-Sep-2024
• Completion Date: 04-Oct-2024

Relations

• Revises: IEC PAS 60704-2-15:2008 - Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-15: Particular requirements for household food waste disposers
• Effective Date: 05-Sep-2023
• Revises: IEC PAS 60704-2-15:2008/COR1:2012 - Corrigendum 1 - Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-15: Particular requirements for household food waste disposers
• Effective Date: 05-Sep-2023

Overview

IEC 60704-2-15:2024 is the International Electrotechnical Commission’s particular test standard for the determination of airborne acoustical noise from household food waste disposers. It applies to single‑unit electric disposers for domestic kitchens (permanently connected to water and sewage, contained within a kitchen cabinet). Commercial units for restaurants, hotels or industry are excluded. This first full edition replaces IEC/PAS 60704‑2‑15:2008 and constitutes a technical revision aligned with IEC 60704‑1:2021.

Key topics and technical requirements

• Scope and definitions: Clarifies terms such as batch feed operation and standard hard test load used for reproducible noise testing.
• Measurement environment and methods: Recommends use of ISO measurement techniques (ISO 3743‑1, ISO 3743‑2, ISO 3744) and specifies criteria for test enclosures and acoustical environments. Adds an extra microphone position for free‑field tests.
• Test load and conditioning: Defines a standard hard test load (fifteen 12.7 mm nylon 6/6 balls, soaked for 7 days, room temperature) and conditions for appliance and grind chamber preparation (e.g., run through 10 × 30 s operational cycles before measurement).
• Water and electrical supply conditions: Water temperature and flow requirements are specified (water temperature between 4 °C and 27 °C; flow rate 6 L/min ± 0.3 L/min), plus instructions for where to measure supply voltage.
• Measurement uncertainty and reporting: Measurement uncertainty and standard deviations have been reviewed; for declaration and verification under IEC 60704‑3 a standard deviation σ = 2.5 dB is specified. Information to be recorded and reported has been updated for consistency with Part 1.
• Operational procedures: Details for batch feed loading, operator positioning to minimize acoustic influence, flushing and inspection after tests.

Applications and users

This standard is essential for:

• Manufacturers and product designers-to design quieter disposers and verify acoustical performance during development.
• Independent test laboratories and certification bodies-for repeatable, accredited noise testing and issuing compliant results.
• Regulators and procurement specialists-to specify noise performance in regulations, product standards or purchasing specifications.
• R&D and quality assurance teams-to benchmark products and control production noise variability.

Practical uses include product noise declarations, comparative lab testing, compliance checks and design optimisation for consumer satisfaction.

Related standards

• IEC 60704‑1:2021 - General requirements for airborne acoustical noise measurement (used in conjunction).
• IEC 60704‑3 - Declaration and verification of noise emission values.
• ISO 3743‑1, ISO 3743‑2, ISO 3744 - Accepted acoustic measurement methods.
• ANSI/ASME A112.19.3‑2022 - Referenced for stainless steel plumbing fixture considerations.

Keywords: IEC 60704‑2‑15:2024, food waste disposer noise test, household food waste disposers, airborne acoustical noise, noise measurement, standard test load, test enclosure, sound power level.

Standards Content (Sample)

IEC 60704-2-15 ®
Edition 1.0 2024-09
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-15: Particular requirements for household food waste disposers

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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About the IEC
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International Standards for all electrical, electronic and related technologies.

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IEC 60704-2-15 ®
Edition 1.0 2024-09
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Test code for the determination of

airborne acoustical noise –
Part 2-15: Particular requirements for household food waste disposers

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.140.20; 97.040.50 ISBN 978-2-8322-9643-1

– 2 – IEC 60704-2-15:2024 © IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Measurement methods and acoustical environment . 7
6 Operation and location of appliances under test . 8
7 Measurement of sound pressure levels . 12
8 Calculation of sound pressure and sound power levels . 14
9 Information to be recorded . 14
10 Information to be reported . 14
Annex A (normative) Standard test table . 15
Annex B (informative) Test enclosure . 16

Figure 101 – Food waste disposer . 10
Figure 102 – Test enclosure – Mandatory characteristics drawing . 12
Figure 103 – Six-microphone geometric setup with four optional microphones on the
top measurement plane . 13
Figure B.1 – Detail drawing of recommended design . 16
Figure B.2 – ISO view without front panel and with hardware . 17
Figure B.3 – Front view without front panel and with hardware, sink disposer and
mounting assembly . 18

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION
OF AIRBORNE ACOUSTICAL NOISE –

Part 2-15: Particular requirements for household food waste disposers

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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60704-2-15 has been prepared by IEC subcommittee 59L: Small household appliances, of
IEC technical committee 59: Performance of household and similar electrical appliances. It is
an International Standard.
This first edition cancels and replaces the first edition of IEC/PAS 60704-2-15, published in
2008. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to
IEC/PAS 60704-2-15:2008:
a) measurement uncertainty and standard deviations have been reviewed;
b) definitions of standard test programme and standard test load have been reviewed;
c) definition of the test enclosure has been reviewed;

– 4 – IEC 60704-2-15:2024 © IEC 2024
d) additional microphone position for test in free field environment;
e) information to be reported has been reviewed;
f) aligned to IEC 60704-1:2021.
The text of this International Standard is based on the following documents:
Draft Report on voting
59L/252/CDV 59L/264/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
This Part 2-15 is intended to be used in conjunction with the fourth edition of IEC 60704-1:2021,
Household and similar electrical appliances – Test code for the determination of airborne
acoustical noise – Part 1: General requirements.
The relevant text of IEC 60704‑1:2021 as amended by this publication establishes the test code
for household food waste disposers.
This document supplements or modifies the corresponding clauses in IEC 60704-1:2021. When
a particular subclause of IEC 60704-1:2021 is not mentioned in this document, that subclause
is applicable as far as reasonable. Where this standard states "addition", "modification" or
"replacement", the relevant requirements, test specifications or explanatory matter in
IEC 60704‑1:2021 are to be adapted accordingly.
Subclauses, tables and figures that are additional to those in IEC 60704-1:2021 are numbered
starting from 101. Additional annexes are lettered AA, BB, etc.
Unless notes are in a new subclause or involve notes in IEC 60704-1:2021, they are numbered
starting from 101, including those in a replaced clause or subclause.
In this standard, the following print types are used:
• terms defined in Clause 3: bold type.
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 webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

– 6 – IEC 60704-2-15:2024 © IEC 2024
INTRODUCTION
The noise of food waste disposers has been measured up to now by making use of
IEC/PAS 60704-2-15 .
The measuring conditions specified in this document provide for sufficient accuracy in
determining the noise emitted and comparing the results of measurements taken by different
laboratories, whilst simulating as far as possible the practical use of food waste disposers.
It is recommended to consider the determination of noise levels as part of a comprehensive
testing procedure covering many aspects of the properties and performance of food waste
disposers.
NOTE As stated in the introduction to IEC 60704-1:2021, this test code is concerned with airborne noise only.

___________
This publication has been withdrawn.

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION
OF AIRBORNE ACOUSTICAL NOISE –

Part 2-15: Particular requirements for household food waste disposers

1 Scope
Replacement:
These particular requirements apply to single unit electric food waste disposers for household
use, with or without automatic programme control, for cold water supply, for permanent
connection to water supply and sewage systems, intended for connection to the kitchen sink
drain and contained within a kitchen cabinet enclosure.
Food waste disposers for restaurant
...

IEC 60704-2-15 ®
Edition 1.0 2024-09
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This full version of IEC 60704-2-15:2024 includes the content of the references made to
IEC 60704-1:2021
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-15: Particular requirements for household food waste disposers
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews, graphical symbols and the glossary.
committee, …). It also gives information on projects, replaced With a subscription you will always have access to up to date
and withdrawn publications. content tailored to your needs.

IEC Just Published - webstore.iec.ch/justpublished
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Stay up to date on all new IEC publications. Just Published
The world's leading online dictionary on electrotechnology,
details all new publications released. Available online and once
containing more than 22 500 terminological entries in English
a month by email.
and French, with equivalent terms in 25 additional languages.

Also known as the International Electrotechnical Vocabulary
IEC Customer Service Centre - webstore.iec.ch/csc
(IEV) online.
If you wish to give us your feedback on this publication or need

further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 60704-2-15 ®
Edition 1.0 2024-09
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This full version of IEC 60704-2-15:2024 includes the content of the references made to
IEC 60704-1:2021
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-15: Particular requirements for household food waste disposers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.140.20; 97.040.50 ISBN 978-2-8322-9772-8

– 2 – IEC 60704-2-15:2024 EXV © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION to IEC 60704-1:2021 . 7
INTRODUCTION to IEC 60704-2-15:2024 . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Measurement methods and acoustical environments . 11
4.1 General . 11
4.2 Direct method . 11
4.3 Comparison method . 12
4.4 Acoustical environments . 12
4.4.1 General requirements and criterion for adequacy of the test
environment . 12
4.4.2 Criterion for background noise level . 13
4.4.3 Environmental conditions . 13
4.5 Measurement uncertainties . 13
4.5.1 General . 13
4.5.2 Standard deviations on repeatability and reproducibility and standard
deviations related to declaration and verification . 13
5 Instrumentation . 14
5.1 Instrumentation for measuring acoustical data . 14
5.2 Instrumentation for measuring climatic conditions . 14
5.3 Instrumentation for measuring operating conditions . 14
6 Operation and location of appliances under test . 14
6.1 Equipping and pre-conditioning of appliances . 14
6.2 Supply of electric energy and of water or gas . 15
6.3 Climatic conditions . 15
6.4 Loading and operating of appliances during tests . 15
6.5 Location and mounting of appliances . 16
7 Measurement of sound pressure levels . 18
7.1 Microphone array, measurement surface and RSS location for essentially
free field conditions over reflecting plane(s) . 18
7.2 Microphone array and RSS location in hard-walled test rooms . 20
7.3 Microphone array and RSS location in special reverberation test rooms . 21
7.4 Measurements . 21
8 Calculation of sound pressure and sound power levels . 22
8.1 General . 22
8.2 Corrections for background noise levels . 22
8.3 Corrections for the test environment . 23
8.4 Calculation of sound pressure level averaged over the microphone positions . 23
8.5 Calculation of sound power levels with the comparison method . 23
8.6 Calculation of sound power levels in free field conditions over a reflecting
plane . 24
8.7 Calculation of A-weighted sound power level with the direct method in
special reverberation test rooms . 24
9 Information to be recorded . 25
9.1 General data . 25

9.2 Description of appliance under test . 25
9.3 Measurement method . 25
9.4 Acoustical test environment . 25
9.5 Instrumentation . 26
9.6 Equipment and pre-conditioning of appliance under test . 26
9.7 Electric supply, water supply, etc. . 26
9.8 Climatic conditions . 26
9.9 Operation of the appliance under test . 26
9.10 Location and mounting of the appliance under test. 27
9.11 Microphone array . 27
9.12 Measurement data . 27
9.13 Calculated sound pressure and sound power levels . 27
9.14 Reporting . 27
10 Information to be reported . 28
10.1 General data . 28
10.2 Appliance under test . 28
10.3 Test conditions for the appliance . 28
10.4 Acoustical data . 29
Annex A (normative) Standard test table . 30
Annex B (normative) Test enclosure . 31
Annex C (informative) Guidelines for the design of simple test rooms with essentially
free field conditions. 34
Bibliography . 35

Figure 101 – Food waste disposer . 16
Figure 102 – Test enclosure – Mandatory characteristics drawing . 18
Figure 2 – Measurement surface – parallelepiped – with key microphone positions, for
floor standing appliances placed against a wall . 19
Figure 103 – Six-microphone geometric setup with four optional microphones on the
top measurement plane . 20
Figure B.1 – Detail drawing of recommended design . 31
Figure B.2 – ISO view without front panel and with hardware . 32
Figure B.3 – Front view without front panel and with hardware, sink disposer and
mounting assembly . 33

– 4 – IEC 60704-2-15:2024 EXV © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION
OF AIRBORNE ACOUSTICAL NOISE –

Part 2-15: Particular requirements for household food waste disposers

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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s),
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
https://patents.iec.ch. IEC shall not be held responsible for identifying any or all such patent rights.
This extended version (EXV) of the official IEC Standard provides the user with the full
content of the Standard.
made to IEC 60704-1:2021.
The specific content of IEC 60704-2-15:2024 is displayed on a blue background.

IEC 60704-2-15 has been prepared by IEC subcommittee 59L: Small household appliances,
of IEC technical committee 59: Performance of household and similar electrical appliances. It
is an International Standard.
This first edition cancels and replaces the first edition of IEC/PAS 60704-2-15, published in
2008. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to
IEC/PAS 60704-2-15:2008:
a) measurement uncertainty and standard deviations have been reviewed;
b) definitions of standard test programme and standard test load have been reviewed;
c) definition of the test enclosure has been reviewed;
d) additional microphone position for test in free field environment;
e) information to be reported has been reviewed;
f) aligned to IEC 60704-1:2021.
The text of this International Standard is based on the following documents:
Draft Report on voting
59L/252/CDV 59L/264/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/publications.
This Part 2-15 is intended to be used in conjunction with the fourth edition of IEC 60704-
1:2021, Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise – Part 1: General requirements.
The relevant text of IEC 60704‑1:2021 as amended by this publication establishes the test
code for household food waste disposers.
This document supplements or modifies the corresponding clauses in IEC 60704-1:2021.
When a particular subclause of IEC 60704-1:2021 is not mentioned in this document, that
subclause is applicable as far as reasonable. Where this standard states "addition",
"modification" or "replacement", the relevant requirements, test specifications or explanatory
matter in IEC 60704‑1:2021 are to be adapted accordingly.
Subclauses, tables and figures that are additional to those in IEC 60704-1:2021 are numbered
starting from 101. Additional annexes are lettered AA, BB, etc.
Unless notes are in a new subclause or involve notes in IEC 60704-1:2021, they are
numbered starting from 101, including those in a replaced clause or subclause.
In this standard, the following print types are used:
• terms defined in Clause 3: bold type.

– 6 – IEC 60704-2-15:2024 EXV © IEC 2024
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 webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
INTRODUCTION to IEC 60704-1:2021
Although the noise emitted by household appliances does not generally present a hazard to
the hearing of the operator and other exposed persons, the need for standardization
procedures for the determination of the noise emitted has been recognized for a long time.
Such procedures should be specified, not only for special types of appliances, but also the
principles should be applicable to the majority of appliances in general use.
Generally, the determination of noise levels is only part of a comprehensive testing procedure
covering many aspects of the properties and performances of the appliance. It is therefore
important that the requirements for noise measurements (such as test environment,
instrumentation, and amount of labour involved) be kept at a modest level.
The results of noise measurements are used for many purposes, for example for noise
declaration, as well as for comparing the noise emitted by a specific appliance to the noise
emitted by other appliances of the same family. In other cases, the results are taken as a
basis for engineering action in the development stages of new pieces of equipment, or in
deciding on means for sound insulation. For all purposes, it is important to specify procedures
with known accuracy so that the results of measurements taken by different laboratories can
be compared.
These conditions have, as far as possible, been taken into account in the preparation of this
test code. The acoustic measuring methods are based on those described in
ISO 3743‑1:2010, ISO 3743-2:2018 and ISO 3744:2010.
The adoption of these methods permits the use of hemi-anechoic rooms, special reverberation
test rooms and hard-walled test rooms. The result of the measurements is the sound power
level of the appliance. Within the measuring uncertainty specific to these methods, the results
from the determination under free field conditions over a reflecting plane are equal to those
obtained in reverberant fields.
The use of intensity methods as described in ISO 9614-1:1993, ISO 9614-2:1996, and
ISO 9614-3:2002 is applicable under special conditions, which are described in specific parts
of the IEC 60704-2 series.
This test code is concerned with airborne noise only. In some cases, structure-borne noise,
for example transmitted to the adjoining room, can be of importance.

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INTRODUCTION to IEC 60704-2-15:2024
The noise of food waste disposers has been measured up to now by making use of
IEC/PAS 60704-2-15 .
The measuring conditions specified in this document provide for sufficient accuracy in
determining the noise emitted and comparing the results of measurements taken by different
laboratories, whilst simulating as far as possible the practical use of food waste disposers.
It is recommended to consider the determination of noise levels as part of a comprehensive
testing procedure covering many aspects of the properties and performance of food waste
disposers.
NOTE As stated in the introduction to IEC 60704-1:2021, this test code is concerned with airborne noise only.

—————————
This publication has been withdrawn.

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION
OF AIRBORNE ACOUSTICAL NOISE –

Part 2-15: Particular requirements for household food waste disposers

1 Scope
These particular requirements apply to single unit electric food waste disposers for household
use, with or without automatic programme control, for cold water supply, for permanent
connection to water supply and sewage systems, intended for connection to the kitchen sink
drain and contained within a kitchen cabinet enclosure.
Food waste disposers for restaurants, hotels and industry purposes are excluded.
NOTE For determining and verifying noise emission values declared in the product specification,
see IEC 60704-3.
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 60704-2 (all parts), Household and similar electrical appliances – Test code for the
determination of airborne acoustical noise
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 61260-1:2014, Electroacoustics – Octave-band and fractional-octave-band filters – Part 1:
Specifications
IEC 61672-1:2013, Electroacoustics – Sound level meters – Part 1: Specifications
ISO 3743-1:2010, Acoustics – Determination of sound power levels of noise sources –
Engineering methods for small, movable sources in reverberant fields – Part 1: Comparison
method for hard-walled test rooms
ISO 3743-2:2018, Acoustics – Determination of sound power levels of noise sources using
sound pressure – Engineering methods for small, movable sources in reverberant fields –
Part 2: Methods for special reverberation test rooms
ISO 3744:2010, Acoustics – Determination of sound power levels of noise sources using
sound pressure – Engineering method in an essentially free field over a reflecting plane
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

– 10 – IEC 60704-2-15:2024 EXV © IEC 2024
ISO 9614-3:2002, Acoustics – Determination of sound power levels of noise sources using
sound intensity – Part 3: Precision method for measurement by scanning
ISO 6926:2016, Acoustics – Requirements for the performance and calibration of reference
sound sources used for the determination of sound power levels
ISO 12001:1996, Acoustics – Noise emitted by machinery and equipment – Rules for the
drafting and presentation of a noise test code
ANSI/ASME A112.19.3-2022, Stainless Steel Plumbing Fixtures
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. Terms and
definitions pertinent to the determination of sound power levels can be found in ISO 3743-
1:2010, ISO 3743-2:2018 and ISO 3744:2010.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
measurement time interval
portion or a multiple of an operational period or operational cycle for which the sound power
levels are determined
3.2
operational period
interval of time during which a specified process is accomplished by the appliance under test
(for example, washing or rinsing or drying for a dishwasher)
3.3
operational cycle
specific sequence of operational periods occurring while the appliance under test performs a
complete work cycle
Note 1 to entry: During the operational cycle, each operational period is associated with a specific process that
can occur only once, or can be repeated (for example, washing and rinsing and drying for a dishwasher).
3.4
time history
continuous recording of the sound pressure level (for a distinct microphone position) as a
function of time, which is obtained during one or more operational periods of an operational
cycle
3.5
reference box
hypothetical right parallelepiped terminating on the reflecting plane(s) on which the noise
source under test is located, that just encloses the source including all the significant sound
radiating components and any test table on which the source is mounted
[SOURCE: ISO 3744:2010, 3.10, modified – The note has been omitted.]
3.6
test enclosure
enclosure used for simulating the typical acoustic built-in or/and mounting conditions

3.101
batch feed operation
method of operation in which the operator loads the food waste into the container body
3.102
standard hard test load
rigid standard test load for noise measurements
4 Measurement methods and acoustical environments
4.1 General
This document is concerned with objective methods of engineering accuracy grade 2 in
accordance with ISO 12001:1996 for determining sound power levels L , expressed in
W
decibels (dB), with reference to a sound power of one picowatt (1 pW), of airborne acoustical
noise within the specified frequency range of interest (generally including the octave-bands
with centre frequencies from 125 Hz to 8 000 Hz), and for prescribed operating conditions of
the appliance to be measured.
Methods for determining sound power levels with precision accuracy grade 1 in accordance
with ISO 12001:1996, as specified for example in ISO 3741 and ISO 3745, are not included in
this document. They may, however, be applied if the appropriate test environment and
instrumentation are available.
The methods specified in ISO 3743-1, ISO 3743-2 and ISO 3744 can be used for measuring
noise emitted by food waste disposers.
NOTE 1 The noise values obtained under the described conditions of this document will not necessarily
correspond to the noise experienced under the operational conditions of practical use.
NOTE 2 For quality control during production etc., simplified methods can be appropriate. For noise reduction
purposes, other measurement methods employing, for example, narrow-band analysis or intensity techniques
usually have to be applied. These methods are not covered by this document.
The total noise emitted by machinery or equipment and radiated in all directions to the space
surrounding the machine can be characterized by the sound power of the machine. Within the
accuracy range of this document, the sound power of a machine is basically independent of
the environment in which the machine is installed
Therefore, the concept of sound power level has been chosen for expressing the noise
emission of appliances for household and similar purposes.
The preferred noise emission quantity is the A-weighted sound power level, L , in dB
WA
(re 1 pW).
According to this document, two principal methods exist, the direct method and the
comparison method, as described in 4.2 and 4.3. These two methods can be used
alternatively.
Different types of environments, as described in 4.4, may be used. A part of the IEC 60704-2
series may, if necessary, exclude one or several combinations among those available.
4.2 Direct method
The direct method can be used only for measurements in qualified test environments in
accordance with ISO 3744:2010 for free field conditions over reflecting plane(s), and in
accordance with ISO 3743-2:2018 for special reverberation test rooms.
With this method, the sound power level is determined

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– in free field conditions over reflecting plane(s), from time-averaged sound pressure levels
(on a mean-square basis) over the measurement surface and from the area of the
measurement surface, S, or
– in reverberation and special reverberation test rooms, from averaged sound pressure
levels, and from the reverberation time and the volume of the test room.
If for a measurement in a free field, reverberation or special reverberation room is not
possible because the appliance cannot be placed or operated in such an environment, the
intensity method in accordance with ISO 9614-1:1993, ISO 9614-2:1996, and ISO 9614-
3:2002 shall be applied. For the intensity method, the standard deviations given in the parts of
the IEC 60704-2 series and IEC 60704-3:2019 are not applicable unless stated explicitly.
These methods yield results expressed in A-weighted sound power levels (and in octave- or
1/3 octave-band sound power levels, if required) that are calculated directly from measured
sound pressure levels.
NOTE This method can also be used in conjunction with more precise methods, such as those given in ISO 3741
and ISO 3745.
If pure tone components are present in the noise emitted, proper precautions shall be taken
as specified in ISO 3743-2.
4.3 Comparison method
The comparison method for measurement is explicitly described in ISO 3743-1:2010 and in
ISO 3743-2:2018.
NOTE The term "comparison method" is not explicitly given in ISO 3744:2010, but when applying the "absolute
comparison test" for the determination of the environmental correction given in A.3 of ISO 3744:2010, by using a
reference sound source, the procedure is, in fact, a comparison method.
With this method, the sound power level is determined by comparing the averaged values (on
a mean-square basis) of the sound pressure levels produced by the source in the test room to
the averaged values of the sound pressure levels produced in the same room by a calibrated
reference sound source (RSS) of known sound power output, complying with the requirements
of ISO 6926:2016. The difference in sound pressure levels is equal to the difference in sound
power levels when conditions are the same for both sets of measurements.
This method yields results expressed in octave- or 1/3 octave-band sound power levels, and
the A-weighted sound power level is calculated from the octave- or 1/3 octave-band sound
power levels.
To check whether there is a systematic difference between results obtained in different
environments, the use of the comparison method is recommended.
If pure tone components are present in the noise emitted, proper precautions shall be taken
as specified in ISO 3743-1 and ISO 3743-2.
coustical environments
4.4 A
4.4.1 General requirements and criterion for adequacy of the test environment
They are given in the following clauses:
– Clause 4 of ISO 3743-1:2010 for hard-walled test rooms;
– Clause 5 of ISO 3743-2:2018 for special reverberation test rooms and
– Clause 4 of ISO 3744:2010 for free-field conditions over a reflecting plane.
A classification of different types of noise is given in ISO 12001:1996. The method specified
in ISO 3744:2010 is suitable for measurements of all types of noise emitted by household

appliances. The methods specified in ISO 3743-1:2010 and ISO 3743-2:2018 are suitable for
all types of noise, except for sources of impulsive noise consisting of short-duration noise
bursts. This will be taken into account in the preparation of parts of the IEC 60704-2 series.
The method specified in ISO 3744 is applicable to noise sources of any size. When applying
ISO 3743-1 and ISO 3743-2, it shall be ensured that the maximum size of the cabinet
enclosing the food waste disposer under test fulfils the requirements specified in ISO 3743-
1:2010, 4.2, and ISO 3743-2:2018, Clause 5.
NOTE For free-field conditions over a reflecting plane, the absolute comparison test for the qualification of the
environment, described in Clause A.2 of ISO 3744:2010, is preferred.
Guidelines for the design of simple test rooms with free-field conditions are given in Annex C.
Guidelines for the design of a suitable special reverberation test room are given in
ISO 3743-2:2018, Annex A.
4.4.2 Criterion for background noise level
Requirements for the background noise level are given in 4.5 of ISO 3743-1:2010, in 6.5 of
ISO 3743-2:2018 and in 4.2 of ISO 3744:2010. Averaged over the microphone positions, the
background noise level shall be at least 6 dB below, and preferably more than 15 dB below,
the sound pressure level to be measured.
NOTE If the difference between the sound pressure levels of the background noise and the appliance noise is
less than 6 dB, see 8.2.
4.4.3 Environmental conditions
Environmental conditions having an adverse effect on the microphone used for the
measurements (for example, strong electric or magnetic fields, wind, impingement of air
discharge from the equipment being tested, high or low temperatures) shall be avoided by
proper selection or positioning of the microphone.
The instructions of the manufacturers of the measurement instruments regarding adverse
environmental conditions shall be followed. The microphone shall always be oriented in such
a way that the angle of incidence of the sound waves is that for which the microphone is
calibrated.
4.5 Measurement uncertainties
4.5.1 General
The estimated values of the standard deviations of reproducibility of sound power levels
determined in accordance with this document are given in 9.1 of ISO 3743-1:2010, in 11.1 of
ISO 3743‑2:2018 and in 9.1 of ISO 3744:2010. But for a particular family of appliances of
similar size with similar operating conditions, the standard deviations of reproducibility can be
smaller than these values. Hence, in the IEC 60704-2 series, standard deviations smaller than
those listed in ISO standards can be stated if substantiation is available from the results of
suitable interlaboratory tests.
In the case of discrepancies between the measurements where the results normally remain
inside the foreseen standard deviation, it can be helpful to perform measurements according
to the upper grade of accuracy: grade 1, laboratory or precision, as described in ISO 3741 or
ISO 3745.
4.5.2 Standard deviations on repeatability and reproducibility and standard
deviations related to declaration and verification
The estimated values of standard deviations of sound power levels determined in accordance
with this document are currently not available.

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For the purpose of determining and verifying declared noise emission values for food waste
disposers in accordance with IEC 60704-3, the value σ is 2,5 dB.
M
5 Instrumentation
5.1 Instrumentation for measuring acoustical data
Requirements for the instrumentation system and for its calibration are given in Clause 5 of
ISO 3743-1:2010, in Clause 7 of ISO 3743-2:2018 and in Clause 5 of ISO 3744:2010.
The instrumentation system shall meet the requirements for a type 1 instrument laid down in
IEC 61672-1:2013, in accordance with the basic standard used. For measurements in octave-
and 1/3 octave-bands, the instrumentation system shall meet the requirements of
IEC 61260‑1:2014.
RSS shall meet the requirements of ISO 6926:2016, and shall be calibrated annually.
5.2 Instrumentation for measuring climatic conditions
5.2.1 The temperature is determined with instruments having an accuracy of ±1 °C.
5.2.2 The relative humidity is determined with instruments having an absolute accuracy of
±2 % within the measuring range.
5.2.3 The absolute air pressure is determined with instruments having an accuracy of
±0,5 kPa.
5.3 Instrumentation for measuring operating conditions
5.3.1 The voltage at the plug of the cable or cord of mains-powered appliances is
measured with voltmeters having an accuracy of class 0,5 instruments.
5.3.2 The voltage at the battery terminals of battery-powered appliances is measured with
voltmeters having an accuracy of class 0,5 instruments.
5.3.3 The rotational speed of motors, attachments, etc. is measured, if necessary, with
speed indicators having an accuracy of ±1 % of full scale.
6 Operation and location of appliances under test
6.1 Equipping and pre-conditioning of appliances
6.1.1 The appliance is equipped with attachments, accessories, etc. as delivered by the
manufacturer for the intended use or function.
6.1.2 Care shall be taken to ensure that any auxiliary equipment (such as electrical
conduits or cables, piping for water supply or drainage, air ducts, etc.) necessary for the
operation of the appliance, does not radiate a significant amount of sound into the test
environment or change the sound output of the appliance. Guidelines are given in 6.2 of
ISO 3743-1:2010, in 8.4 of ISO 3743-2:2018 and in 6.2 ISO 3744:2010.
6.1.3 Prior to commencing measurements, the inside of the grind chamber shall be clean
and free of any debris from prior operation. The food waste disposer shall be run through 10
complete operational cycles, of a 30 s duration, with a standard hard test load (3.102).
6.1.4 Not applicable.
6.2 Supply of electric energy and of water or gas
6.2.1 The supply voltage is measured at the plug of a non-detachable cable or cord, at the
appliance inlet if a detachable cord is provided or no cable is provided, but in no case at the
entrance of extensions cables or cords.
6.2.2 Not applicable.
6.2.3 Not applicable.
6.2.4 The temperature of the supply water shall be between 4 °C and 27 °C.
The flow rate of the water supply shall be 6 l/min ± 0,3 l/min. The water faucet shall be
positioned in such a way that the water flows down the side of the sink into the drain, creating
negligible water splash noise.
6.3 Climatic conditions
In general, household appliances (unless otherwise specified for a special family) are
operated under the following climatic conditions:
ambient temperature 18 °C to 28 °C
relative humidity 25 % to 70 %
atmospheric pressure 86 kPa to 106 kPa
6.4 Loading and operating of appliances during tests
6.4.1 General requirements are given in 6.5 of ISO 3743-1:2010, in 8.5 of ISO 3743-
2:2018 and in 6.6 of ISO 3744:2010. For the purpose of establishing a noise test code, the
following guidelines are given, unless otherwise specified in the relevant part of the
IEC 60704-2 series.
In general, the loading and operating conditions should, as far as practicable, simulate normal
use but, in every case, preference has to be given to simple conditions providing satisfactory
repeatability and reproducibility.
The presence of an operator should be avoided. An operator shall be present only if the
application of the load is not practicable without an operator. This operator shall not wear
abnormally sound absorptive clothing that might influence the sound measurements.
6.4.2 In batch feed operation the food waste is loaded in the container body (see
Figure 101) prior to starting the water flow and then the operational cycle of the disposer.
The standard hard test load consists of fifteen (15) 12,7 mm (0,5 in) diameter nylon 6/6 solid
balls. This grind media shall be conditioned by soaking in water for seven days prior to use.
The test load shall be at room temperature when the test programme starts.
The appliance under test shall be at room temperature when the test programme starts.
The appliance shall be operated according to 3.101 using the test load as described in 3.102.
If an operator has to be present to place the test load in the grind chamber and to start and
stop the operational cycle of the disposer, the operator's position shall be chosen to minimize
the influence upon the acoustic measurement and shall be consistent for all tests. A switch
may be used to start and stop the operational cycle and minimize the influence of the operator
on the measurements.
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Upon completion of the measurements, the remaining material in the grind chamber is to be
removed and the disposer flushed with wate
...