Table of Contents

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

Abstract

Specifies 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	British Standards Institution
Pages
ISBN
Committee	PEL/14
Supersedes	11/30253149 DC : 0 BS EN 60551 : 1993 98/230265 DC : FEB 98