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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
15-11-1996
English
31-07-1981
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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Superseded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 |
| BS 4196-2:1981 | Sound power levels of noise sources Precision methods for determination of sound power levels for discrete-frequency and narrow-band sources in reverberation rooms |
| BS 7120:1989 | Specification for rating and performance of air to liquid and liquid to liquid chilling packages |
| BS 6805-2:1987 | Statistical methods for determining and verifying stated noise emission values of machinery and equipment Method for determining and verifying stated values for individual machines |
| BS 4196-1:1981 | Sound power levels of noise sources Precision methods for determination of sound power levels for broad-band sources in reverberation rooms |
| BS 7285(1990) : 1990 | METHOD FOR DESCRIBING CHARACTERISTICS OF SERVO-HYDRAULIC TEST EQUIPMENT FOR GENERATING VIBRATION |
| BS 3316-2:1987 | Incinerators Methods of test and calculation for the performance of incineration plant for the destruction of hospital waste |
| BS 6056(1991) : AMD 7960 | DETERMINATION OF TRANSFORMER AND REACTOR SOUND LEVELS |
| BS 848-2:1985 | Fans for general purposes Methods of noise testing |
| BS 3970-1:1990 | Sterilizing and disinfecting equipment for medical products Specification for general requirements |
| BS 2745-1:1993 | Washer-disinfectors for medical purposes Specification for general requirements |
| BS 6056:1981 | Method of measurement of transformer and reactor sound levels |
| BS 4196-3:1981 | Sound power levels of noise sources Engineering methods for determination of sound power levels for sources in special reverberation test rooms |
| BS 6805-3:1987 | Statistical methods for determining and verifying stated noise emission values of machinery and equipment Method for determining and verifying stated values for batches of machines using a simple (transition) method |
| BS 6834:1987 | Specification for active anaesthetic gas scavenging systems |
| BS 6805-1:1987 | Statistical methods for determining and verifying stated noise emission values of machinery and equipment Glossary of terms |
| BS 7025:1988 | Method for preparation of test codes of engineering grade for measurement at the operator\'s or bystander\'s position of noise emitted by machinery |
| BS 6836(1987) : AMD 7527 | SPECIFICATION FOR CENTRIFUGAL PUMPS: CLASS II |
| ISO 3742:1988 | Acoustics — Determination of sound power levels of noise sources — Precision methods for discrete-frequency and narrow-band sources in reverberation rooms |
| ISO 2204:1979 | Acoustics Guide to International Standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings |
| ISO 3744:2010 | Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting plane |
| ISO 354:2003 | Acoustics — Measurement of sound absorption in a reverberation room |
| ISO 266:1997 | Acoustics — Preferred frequencies |
| ISO 3740:2000 | Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards |
| IEC 60225:1966 | Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations |
| ISO 3741:2010 | Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for reverberation test rooms |
| ISO 3745:2012 | Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for anechoic rooms and hemi-anechoic rooms |
| IEC 60179:1973 | Precision sound level meters |
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