IEC 60704-2-4:2011

FOREWORD
INTRODUCTION
1 Scope and object
2 Normative references
3 Terms and definitions
4 Measurement methods and acoustical environments
5 Instrumentation
6 Operation and location of appliances under test
7 Measurement of sound power levels
8 Calculation of sound pressure and sound power levels
9 Information to be recorded
10 Information to be reported
Annexes
Annex A (normative)
Bibliography

IEC 60704-2-4:2011 These particular requirements apply to single unit electrical washing machines and the washing and spinning function of combined appliances for household and similar use and to spin extractors for household and similar use. This third edition cancels and replaces the second edition (2001). Main changes are:
- measurement uncertainty and standard deviations are taken into account,
- definitions of standard test load and standard test program are modified,
- test enclosure was replaced by common test enclosure defined in Part 1 and
- information to be reported is modified.

This publication is to be read in conjunction with IEC 60704-1:2010.