BS 4856-5:1979
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Methods for testing and rating fan coil units, unit heaters and unit coolers Acoustic performance; with ducting
Hardcopy , PDF
15-09-1997
English
31-07-1979
Foreword
Cooperating organizations
Methods
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
9 Rating
10 Example of test results
Section two. Test methods
11 General
12 Application
13 Precision
14 Instrumentation
15 Installation
16 Quantities to be measured
17 Discrete frequency components
18 Method of measurement
19 Determination of sound power level
20 Background noise
Appendix
A ISO standards and draft ISO standards
Tables
1 Range of accuracy in determining sound power levels
of broad-band sources in reverberation rooms
2 Bandwidths
3 Differences for significant frequency components
4 Number of microphone stations
5 Standard deviations
6 Requirements for traverse path
7 Correction requirements for background noise
Figures
1 Arrangements of equipment for measurement of outlet
noise on units with either free air inlet or ducted
inlet
2 Arrangements of equipment for measuring inlet and
casing noise from units with either free air inlet
or ducted inlet
3 Casing radiation test, inlet and outlet ducted
4 End reflection correction diagram
5 Example of typical reference sound source
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