BS 4856-4:1978
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Methods for testing and rating fan coil units, unit heaters and unit coolers Acoustic performance; without additional ducting
Hardcopy , PDF
15-09-1997
English
31-01-1978
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Foreword
Cooperating organizations
Method
Section one. General
1 Scope
2 References
3 Definitions
4 Nomenclature
5 Instrumentation
6 Test procedure
7 Reporting of test results
8 Presentation of test results
Section two. Test methods
9 General
10 Application
11 Precision
12 Instrumentation
13 Installation
14 Quantities to be measured
15 Discrete frequency components
16 Method of measurement
17 Determination of sound power level
18 Background noise
Tables
1 Range of accuracy in determining sound power levels
of broad band sources in reverberation rooms
2 Bandwidths
3 Significant discrete frequencies
4 Number of microphone stations
5 Standard deviations
6 Minimum requirements for traverse path
7 Correction conditions for background noise
Figure
1 Example of typical reference sound source
Testing and rating for sound power emission from equipment defined in BS 4856:Parts 1 and 8, when used directly in the conditioned space, i.e. without ducting. Instructions for calculations and for presentation of test results.
| Committee |
RHE/6
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| ISO 2204:1979 | Acoustics Guide to International Standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings |
| BS 4856-2:1975 | Methods for testing and rating fan coil units, unit heaters and unit coolers Thermal and volumetric performance for cooling duties: without additional ducting |
| BS 4856-1:1972 | Methods for testing and rating fan coil units, unit heaters and unit coolers Thermal and volumetric performance for heating duties; without additional ducting |
| BS 4856-3:1975 | Methods for testing and rating fan coil units, unit heaters and unit coolers Thermal and volumetric performance for heating and cooling duties; with additional ducting |
| PD 5686:1978 | The use of SI units |
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