BS 4196-6:1981
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Sound power levels of noise sources Survey method for determination of sound power levels of noise sources
Hardcopy , PDF
English
31-07-1981
15-11-1996
National foreword
Cooperating organizations
Method
0.1 Related International Standards
0.2 Synopsis of ISO 3746
0.3 Introduction
1 Scope and field of application
2 References
3 Definitions
4 Acoustic environment
5 Instrumentation
6 Installation and operation of source
7 Measurement of weighted sound pressure levels
8 Calculation of surface sound pressure level and
sound power level
9 Information to be recorded
10 Information to be reported
Annex
A Test environment qualification procedure
National appendix
A Proposed amended text for clause 8
B Proposed amended text for the annex
Tables
1 International Standards specifying various methods
for determining the sound power levels of machines
and equipment
2 Uncertainty in determining A-weighted sound power
level by the survey method
3 Co-ordinates of microphone positions in terms of
distances from centre of hemisphere along three
mutually perpendicular axes (x, y, z)
4 Correction for background noise
5 Approximate values of the mean acoustic absorption
coefficient alpha
Figures
1 Microphone array on the hemisphere
2 Location of measurement positions on the
parallelepiped
3 Environmental correction K in decibels
Lays down a survey method for measuring the weighted sound pressure levels at prescribed microphone positions around a noise source. The A-weighted sound power level of the source is calculated from the measured values. This method may be applied in situ to sources which cannot be moved to a special test environment.
| Committee |
EH/1
|
| DocumentType |
Standard
|
| Pages |
20
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| UNE-EN 50132-1:2010 | Identical |
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