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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
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
Important note : Users cannot be edited or removed once added to your Multi user PDF.
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
Methods of testing and rating sound power emission resulting from the operation of air-moving parts of fan coil units, unit heaters and coolers as defined in Part 3, when used with ducting. Instructions for calculations and for presentation of test results comprising sound power radiated from the outlet, the inlet or the casing of a unit.
| Committee |
RHE/6
|
| DocumentType |
Standard
|
| Pages |
16
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| BS 7258-1:1990 | Laboratory fume cupboards Specification for safety and performance |
| BS 7258-1:1994 | Laboratory fume cupboards Specification for safety and performance |
| ISO 2204:1979 | Acoustics Guide to International Standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings |
| BS 4856-3:1975 | 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 |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.