Table of Contents

Foreword<br>Introduction<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 Conformity requirements<br>5 Requirements for measurements in a<br>&nbsp;&nbsp;&nbsp;reverberation test room<br>6 Method using measured reverberation time<br>7 Method using calculated air absorption<br>8 Method using a reference sound source<br>9 Method using a free field over a reflecting plane<br>10 Calculation of sound power level under reference<br>&nbsp;&nbsp;&nbsp;meteorological conditions<br>11 Measurement uncertainty<br>12 Information to be recorded<br>13 Information to be reported<br>Annex A (normative) - Calculation of air absorption<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;coefficient<br>Bibliography

Abstract

Defines four methods for the determination of the sound power levels of high-frequency noise emitted by machinery and equipment in the frequency range covered by the octave band centred at 16 kHz, which includes frequencies between 11,2 kHz and 22,4 kHz.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	British Standards Institution
Pages
ISBN
Committee	EH/1/4
Supersedes	BS 7135-2(1989) : 1989 13/30264708 DC : 0