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
1,670
Accredited labs
18
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Showing 226–250 of 1,670 labs
C.W.E. Services
Active
(HSG 264, 2012)
HSG 227 (2004))
Safety Executive guides HSG 264
(2012) and App 3 of HSG 227
(HSG 248) – 2021
+ 3 more
CAE
Active
NF T 90-412
DIN EN ISO 7899-1
DIN ISO 11465
ISO 5815-1
DIN EN ISO 9308-2
+ 3 more
UNE-EN ISO 16283-1
UNE-EN ISO 140-4
UNE-EN ISO 16283-2
UNE-EN ISO 140-7
UNE-EN ISO 140-5
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CALTECNICA INGENIEROS
Active
(3 ± 0,5) 10-2 mol/mol (5 ± 0,5) 10-
(5 ± 0,5) 10-2 mol/mol
- 80 ˚C a 200 ˚C
- 20 ˚C a < 23 ˚C 23 ˚C a 40 ˚C > 40 ˚C
- 20 ˚C a 60 ˚C
+ 2 more
DIN EN ISO 17294-2
DIN EN ISO 14403-2
DIN EN ISO 13395
VDE 414-9-11
DIN EN ISO 10304-1
+ 3 more
CANAGROSA LAB&SERVICES
Active
ISO 2808
ISO 48-4
UNE-EN ISO 2808
ISO 2409
UNE-EN ISO 2360
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CANDELTEC
Active
IEC 62471-7
IEC 62471: 2006
UNE-EN 13032-1
UNE-EN 62471
UNE-EN 13032-4
CARTESY
Active
Tensile testing of metallic materials (I
Vickers hardness test (ISO 6507)
Kraft
Railway vehicles — specific test require
Railway — traction effort and braking fo
+ 3 more
(0,15 ± 0,02) · 10-2 mol/mol (0,50 ± 0,0
(6,0 ± 1,0) · 10-2 mol/mol (11,5 ± 2,0)
(10 ± 2) · 10-6 mol/mol (50 ± 8) · 10-6
(0,15 ± 0,02) · 10-2 mol/mol (0,30 ± 0,0
1,000 ± 0,100
+ 3 more
CATAS SpA
Active
ISO 9308-1
ISO 7899-2
DIN EN ISO 11205
DIN EN ISO 10304-1
ISO 14189
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DIN EN 12390-6
DIN EN 196-2
DIN EN 62196-1: 2015
DIN EN 12390-3
ISO 13320
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BS EN ISO 1924-2:2008
DIN EN ISO 1974
DIN EN 12758
BS EN ISO 12625-4:2022
ISO 535
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DIN EN 1186-3
DIN EN ISO 7730
DIN EN 12457-2
DIN EN ISO 6888-1
DIN EN ISO 7393-2
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DIN EN 13260
DIN EN 13261
DIN EN 13262
Railway end stop systems (EN 14752)
Railway vehicle body structural requirem
+ 3 more
UNE-EN 60567
IEC 60814
UNE-EN 61198
IEC 60247
UNE-EN 61619
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UNE-EN ISO 16283-1
UNE-EN ISO 16283-2
UNE-EN ISO 16283-3
UNE-EN ISO 3382-2
CIEMAT
Active
OM H-3 based on ISO 9698:2019
ISO 13164-4
SM 3111
UNE-EN ISO 13160
ISO 10704
+ 3 more
UNE-EN ISO 5667-19
UNE-EN ISO 16665
UNE-EN 19493
SM 2510 B
SM 4500 H+
UNE 7027-1
UNE 7887
SM 4500-NO B 2
+ 3 more
ISO 11423-1
DIN EN ISO 10523
BS EN ISO 17294-2
DIN EN ISO 15587-2
DIN EN ISO 7887
+ 3 more
CERECO - BOBIGNY
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NF X 31-615 (Uniquement
NF X 43-257
NF X 43-259
DIN EN 27888
DIN EN ISO 10523
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