Table of Contents

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Reference meteorological conditions
5 Reverberation test room
6 Instrumentation and measurement equipment
7 Definition, location, installation, and operation of
   noise source under test
8 Measurements in the reverberation test room
9 Determination of sound power levels and sound energy levels
10 Measurement uncertainty
11 Information to be recorded
12 Test report
Annex A (informative) - Guidelines for the design of
        reverberation test rooms
Annex B (informative) - Guidelines for the design of rotating
        diffusing vanes
Annex C (normative) - Reverberation test room qualification
        procedure for the measurement of broad-band sound
Annex D (normative) - Reverberation test room qualification
        procedure for the measurement of discrete-frequency
        components
Annex E (informative) - Extension of frequency range to
        frequencies below 100 Hz
Annex F (normative) - Calculation of octave band sound
        power levels and sound energy levels, A-weighted
        sound power levels and A-weighted sound energy levels
        from one-third-octave band levels
Annex G (informative) - Guidelines on the development of
        information on measurement uncertainty
Bibliography

Abstract

Defines methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured in a reverberation test room.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Organization for Standardization
Pages
ISBN
Committee	TC 43
Supersedes	ISO 495 : LATEST NS 4817 : 1982