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
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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
Methods of acoustic testing and rating of induction units for sound power emission and terminal attenuation.
| Committee |
RHE/6
|
| DevelopmentNote |
Supersedes 76/71261 DC. (07/2005) Reviewed and confirmed by BSI, December 2012. (11/2012)
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This Part of this British Standard deals with methods of acoustic testing and rating of induction units, defined in Part 1 of the standard, for:
- sound power emission;
- terminal attenuation.
| ISO 2204:1979 | Acoustics Guide to International Standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings |
| BS 3763:1976 | The International System of units (SI) |
| BS 4954-1:1973 | Methods for testing and rating induction units for air distribution systems Thermal and aerodynamic performance |
| BS 661:1969 | Glossary of acoustical terms |
| BS 4197(1967) : LATEST | A PRECISION SOUND LEVEL METER |
| PD 5686:1978 | The use of SI units |
| BS 1042-1:1964 | Measurement of fluid flow in pipes. Orifice plates, nozzles and venturi tubes. |
| BS 2475:1964 | Specification for octave and one-third octave band-pass filters |
| BS 350:2004 | Conversion factors for units |
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