BS 4954-2:1978
Current
The latest, up-to-date edition.
Methods for testing and rating induction units for air distribution systems Acoustic testing and rating
Hardcopy , PDF
English
30-11-1978
Foreword
Cooperating organizations
Methods
Section one. General
1. Scope
2. References
3. Definitions
4. Nomenclature
5. General test requirements
6. Test conditions
7. Instrumentation
8. Test methods
9. Rating tests
10. Correlation and extrapolation of test data
11. Reporting of test results
Section two. Test methods
12. General
13. Application
14. Precision
15. Instrumentation
16. Installation
17. Quantities to be measured
18. Discrete frequency components
19. Method of measurement
20. Determination of sound power level
21. Background noise
Appendices
A. Example of analysis of single point data
B. Method of testing and rating quiet equipment
C. Quiet air supply for acoustic testing and rating
Tables
1. Correction conditions for background noise
2. Range of accuracy in determining sound power levels
of broad band sources in reverberation rooms
3. Bandwidths
4. Significant discrete frequencies
5. Number of microphone stations
6. Standard deviations
7. Minimum requirements for traverse path
8. Test octave band mean sound pressure levels
9. Test results for generated noise
Figures
1. End reflection correction
2. Arrangement of equipment for insertion loss test
3. Arrangement of equipment for generated noise test
4. Correlation example
5. Example of typical reference and source
6. Extrapolation of LW data on octave bands 4, 5, 6
and 7 below minimum measurable value of 30 dB
7. Equipment for quiet air supply
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