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BS 4196-6:1981

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Sound power levels of noise sources Survey method for determination of sound power levels of noise sources
Available format(s)

Hardcopy , PDF

Superseded date

15-11-1996

Language(s)

English

Published date

31-07-1981

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Superseded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

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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