BS 4196-7:1988
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 using a reference sound source
Hardcopy , PDF
15-09-2000
English
30-12-1988
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National foreword
Committees responsible
Method
0.1 Related International Standards
0.2 Synopsis of ISO 3747
0.3 Introduction
1 Scope and field of application
2 References
3 Definitions
4 Acoustic environment
5 Instrumentation
6 Installation and operation of sources
7 Sound pressure levels on measurement surface
8 Calculation of sound power level
9 Information to be recorded
10 Information to be reported
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 Corrections for background sound pressure levels
4 A-weighting constant
Figures
1 Typical cases for five-sided measurement surface
2 Typical cases for four-sided measurement surface
3 Typical case for three-sided measurement surface
4 Typical cases for two-sided measurement surface
5 Typical case for one-sided measurement surface
6 Key and additional microphone positions for four-
sided measurement surface
7 Key and additional microphone positions for three-
sided measurement surface
8 Key and additional microphone positions for two-
sided measurement surface
9 Key and additional microphone positions for one-
sided measurement surface
10 Key and additional microphone positions for five-
sided measurement surface
11 Key position of the reference sound source when
I3 < or = 1,5 d
12 Key positions of the references sound source when
I3 > 1,5 d
13 Example of reference sound source positions with
long source under test (3d < I1 < or = 6d)
14 Example of reference sound source positions with
flat, broad, long source under test
(2d < I2 < or = 3d)
15 Example of reference sound source positions with
long source under test (3d < I1 < or = 6d) when
I3 > or = 1,5 d (high source under test)
Useful for equipment that cannot be removed for acoustical testing.
| Committee |
EH/1
|
| DocumentType |
Standard
|
| Pages |
26
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| ISO 3747:2010 | Identical |
| 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 |
| 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 |
| ISO 3746:2010 | Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Survey method using an enveloping measurement surface over a reflecting plane |
| IEC 60225:1966 | Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations |
| ISO 6926:2016 | Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels |
| 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 60651:1979+AMD1:1993+AMD2:2000 CSV | Sound level meters |
| IEC 60804:2000 | Integrating-averaging sound level meters |
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