Scope
ISO 3747:2010
Sound Power Level — In-Situ Reference Source Method
This engineering/survey method determines sound power levels using a calibrated reference sound source to account for acoustic environmental conditions during in-situ measurements. It is particularly useful for large or immobile equipment where laboratory testing is impractical, and for on-site verification of noise compliance. The reference source approach compensates for acoustic environmental effects, improving accuracy compared to basic survey methods. Accreditation ensures proper reference source maintenance and measurement protocols are followed. This method is essential for field acceptance testing and environmental noise assessments.
What it measures
- Sound power level (Lw) referenced to 1 pW
- A-weighted and frequency-weighted sound power
- Environmental acoustic correction factors
- In-situ acoustic performance
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DIN EN ISO 3746
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BS EN ISO 3746
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NF EN ISO 3746
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UNI EN ISO 3746
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UNE EN ISO 3746
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NEN EN ISO 3746
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DIN EN ISO 9614-1
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BS EN ISO 9614-1
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NF EN ISO 9614-1
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UNI EN ISO 9614-1
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UNE EN ISO 9614-1
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NEN EN ISO 9614-1
1,868
Accredited labs
20
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Showing 1,351–1,375 of 1,868 labs
CEI 61827
NF S31-190 2008-03 :
ISO 20906 : 2009-12 :
CEM DI-021
CEM DI-004
CEM EL-007
CEM DI-003
CEM DI-008
+ 3 more
EURAMET CG-6
CEM DI-021
CEM DI-004
CEM DI-013
CEM DI-012
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SGS Analytics Germany
Active
DIN EN ISO 5667-1 (A 4)
DIN 38402-A 11
DIN 38402-A 12
DIN 38402-A 13
DIN ISO 5667-5 (A 14)
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DIN ISO 17289
DIN EN ISO 10523
NF X 31-615 (Uniquement
DIN EN ISO 7393-2
DIN EN 27888
+ 1 more
SGS France EIHT - Evry
Active
NF X 43-264
NF X 43-014
NF X 43-267
DIN EN ISO 15587-2
NF T90-111
+ 3 more
NF X 43-269 - Annexe K
NF X43-050 (parties utiles de
ISO 22262-1
NF X 43-050
NF ISO 22262-1 (parties utiles
DIN ISO 17289
DIN EN ISO 10523
NF X 31-615 (Uniquement
DIN EN ISO 7393-2
DIN EN 27888
+ 1 more
SGS France EIHT - Toulouse
Active
NF X 43-269
NF X 43-269 - Annexe K
NF X43-050 (parties utiles de
ISO 22262-1
NF X 43-050
+ 1 more
SGS Germany
Active
IEC 61000-4-2: 2008
IEC 61000-4-3: 2006
IEC 61000-4-4: 2012
IEC 61000-4-5: 2005
IEC 61000-4-6: 2013
+ 3 more
DIN 51757
ASTM D 4052
DIN EN ISO 12185
DIN EN ISO 3405
DIN EN 13016-1
+ 3 more
SGS INSTITUT FRESENIUS
Active
DIN EN ISO 2639
DIN EN ISO 6507-1
DIN EN ISO 6508-1
DIN EN 10328
DIN 50190-3
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DIN EN 61010-2-010: 2015
DIN EN 60335-2-9
IEC 61000-4-8: 2009
IEC 61010-2-010: 2014
DIN EN 61010-2-101
+ 3 more
SGS United Kingdom
Active
Joint IP/ASTM methods marked
IP 195*ASTM D1078
ASTM D847 by titration
ASTM D848
ASTM D 1353
+ 3 more
SGS United Kingdom
Active
(HSG 248) – 2021
ASB/SOP/OM8 based on HSG 248
(PCM) based on HSG 248
SGS United Kingdom
Active
CHEM014 based on BS 4401
based on BS 4401 Part 4:1970
CHEM018 based on BS 4401
CHEM023 based on BS 4401-
ISO 6579-1
+ 3 more
SGS United Kingdom
Active
Method CBG-M-SOP-027 based on BS EN ISO
AM01 based on BS EN ISO 4833-1:
2) Method CBG-M-SOP-038 based on BS ISO
ISO 10272-2
Method CBG-M-SOP-007 based on BS EN ISO
+ 3 more
SGS United Kingdom
Active
MPV Thrombozytenvolume
Gas meters
Power meter method
LENGTH
Waterdraw Method
+ 3 more
SGS United Kingdom
Active
BS EN 286 - Simple unfired pressure
BS EN 13445 Unfired pressure
BS EN13480 Metallic industrial
BS EN 12953 Shell boilers
BS EN BS EN 12952 Water-tube
+ 3 more
SGS United Kingdom
Active
ISO 14184-1
ISO 14184-2
BS EN ISO 1833-1:2020
BS EN ISO 105-B02:2014
BS 4407
+ 3 more
SGS-TÜV Saar
Active
DIN EN 61800-5-1: 2017
DIN 45645 Teil 1
DIN 45680 Beiblatt 1
DIN 45645 Teil 2
DIN EN ISO 11202
+ 3 more
DIN EN ISO 17294-2
DIN EN ISO 13395
DIN EN ISO 10304-1
NF-T 90-029
ISO 5815-1
+ 3 more
SIANTEC- Silvio Herzog e. K.
Active
Härte (WPM) 80 HBW
und Knoop-Verfahren 150 HV
(Härteskalen HV5 bis HV100)
150 HV
(Härteskalen HV 0,1 bis HV 3)
+ 3 more
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