BS 4856-5(1979) : 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

Describes methods of testing for sound power emission resulting from air moving parts of fan coil units, unit heaters and unit coolers when used with ducting. Covers definitions, nomenclature, instrumentation, test procedure, reporting of test results, presentation of test results, rating, example of test results, application, precision, installation, quantities to be measured, discrete frequency components, method of measurement, determination of sound power level and background noise. There are several tables and figures.