Table of Contents

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Sound power for different loading conditions
5 Sound level measurement specification
6 Instrumentation, calibration and accuracy
7 Principal radiating surface
8 Prescribed contour
9 Microphone positions
10 Calculation of the measurement surface area
11 Sound measurement
12 Determination of sound power level by calculation
13 Logarithmic addition and subtraction of individual
   sound levels
14 Far-field calculations for distances larger than 30 m
15 Presentation of results
Annex A (informative) - Narrow-band and time-synchronous
        measurements
Annex B (informative) - Typical report of sound level
        determination
Bibliography

Abstract

Describes sound pressure and sound intensity measurement methods from which sound power levels of transformers, reactors and their associated cooling devices are determined.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN
Committee	TC 14