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BS EN IEC 60704-1:2021

BS EN IEC 60704-1:2021

$167.15

Household and similar electrical appliances. Test code for the determination of airborne acoustical noise – General requirements

Published By Publication Date Number of Pages
BSI 2021 44
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IEC 60704-1:2021 is available as IEC 60704-1:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60704-1:2021 applies to electric appliances (including their accessories or components) for household and similar use, supplied from mains or from batteries. By “similar use” is understood the use in conditions similar to those found in households, for example in inns, coffee houses, tea rooms, hotels, barber or hairdresser shops, launderettes, etc., if not otherwise specified in the IEC 60704-2 series. This document does not apply to: – appliances, equipment, or machines designed exclusively for industrial or professional purposes; – appliances that are integrated parts of a building or its installations, such as equipment for air conditioning, heating and ventilating (except household fans, cooker hoods, free-standing heating appliances, dehumidifiers, air cleaners, and stand-alone water heaters), oil burners for central heating, pumps for water supply and for sewage systems;– separate motors or generators and – appliances exclusively for outdoor use. For determining and verifying noise emission values declared in product specifications, see IEC 60704-3:2019. This fourth edition cancels and replaces the third edition published in 2010. This edition constitutes a technical revision. It includes the following significant changes with respect to the previous edition: a) update of references (especially to ISO standards); b) revision of requirements on climatic conditions; c) revision of requirements on background noise level.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 INTRODUCTION
12 1 Scope
2 Normative references
13 3 Terms and definitions
14 4 Measurement methods and acoustical environments
4.1 General
4.2 Direct method
15 4.3 Comparison method
4.4 Acoustical environments
4.4.1 General requirements and criterion for adequacy of the test environment
16 4.4.2 Criterion for background noise level
4.4.3 Environmental conditions
4.5 Measurement uncertainties
4.5.1 General
4.5.2 Standard deviations on repeatability and reproducibility and standard deviations related to declaration and verification
17 5 Instrumentation
5.1 Instrumentation for measuring acoustical data
5.2 Instrumentation for measuring climatic conditions
5.3 Instrumentation for measuring operating conditions
Tables
Table 1 – Standard deviations of sound power levels
Table 2 – Standard deviations for declaration and verification
18 6 Operation and location of appliances under test
6.1 Equipping and pre-conditioning of appliances
6.2 Supply of electric energy and of water or gas
19 6.3 Climatic conditions
6.4 Loading and operating of appliances during tests
20 6.5 Location and mounting of appliances
22 7 Measurement of sound pressure levels
7.1 Microphone array, measurement surface and RSS location for essentially free field conditions over reflecting plane(s)
23 Figures
Figure 1 – Measurement surface – parallelepiped – with keymicrophone positions, for floor free-standing appliances
24 Figure 2 – Measurement surface – parallelepiped – with key microphone positions, for floor standing appliances placed against a wall
25 Figure 3 – Measurement surface – parallelepiped – with key microphone positions, for high floor-standing appliances placed against a wall
26 Figure 4 – Measurement surface – hemisphere – with key microphone positions, for hand-held, table type and floor-treatment appliances
27 Figure 5 – Measurement surface – quarter-sphere – with key microphone positions, for small floor-standing appliances placed against a wall
29 Figure 6 – Measurement surface – parallelepiped – with fiveor nine microphone positions for stand-type appliances
30 7.2 Microphone array and RSS location in hard-walled test rooms
7.3 Microphone array and RSS location in special reverberation test rooms
7.4 Measurements
31 8 Calculation of sound pressure and sound power levels
8.1 General
8.2 Corrections for background noise levels
32 8.3 Corrections for the test environment
8.4 Calculation of sound pressure level averaged over the microphone positions
8.5 Calculation of sound power levels with the comparison method
33 8.6 Calculation of sound power levels in free field conditions over a reflecting plane
8.7 Calculation of A-weighted sound power level with the direct method in special reverberation test rooms
34 9 Information to be recorded
9.1 General data
9.2 Description of appliance under test
9.3 Measurement method
9.4 Acoustical test environment
35 9.5 Instrumentation
9.6 Equipment and pre-conditioning of appliance under test
9.7 Electric supply, water supply, etc.
9.8 Climatic conditions
9.9 Operation of the appliance under test
9.10 Location and mounting of the appliance under test
36 9.11 Microphone array
9.12 Measurement data
9.13 Calculated sound pressure and sound power levels
9.14 Reporting
37 10 Information to be reported
10.1 General data
10.2 Appliance under test
10.3 Test conditions for the appliance
38 10.4 Acoustical data
39 Annex A (normative) Standard test table
Figure A.1 – Example of standard test table
40 Annex B (normative) Test enclosure
Figure B.1 – Test enclosure
41 Annex C (informative) Guidelines for the design of simple test rooms with essentially free field conditions
42 Bibliography

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BS EN IEC 60704-1:2021
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