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
🇪🇸
UNE EN ISO 9614-1
🇳🇱
NEN EN ISO 9614-1
1,670
Accredited labs
18
Countries
Showing 426–450 of 1,670 labs
UNE EN ISO 15213-1
ISO 6888-1
ISO 7251
ISO 6888-3
ISO 4831
+ 3 more
EUROFINS ENVIRON-LAB SRL
Active
DIN EN 12457-2
ASTM D5373-21
NEN-EN 13191-1
EPA 5035
ISO 16200-1
+ 3 more
EUROFINS HYDROLOGIE EST
Active
DIN ISO 17289
NF X 31-615
DIN EN ISO 7027-2
DIN EN ISO 10523
DIN EN ISO 7393-2
+ 3 more
EUROFINS HYDROLOGIE NORD
Active
NF T90-111
DIN EN ISO 14403-2
NF T 90-412
DIN EN ISO 7899-1
NF-T 90-029
+ 3 more
EUROFINS HYDROLOGIE OUEST
Active
VDE 414-9-11
DIN EN ISO 10304-1
NF X 31-615
ISO 5815-1
NF T90-015-1
+ 3 more
UNE 77061
UNE-EN ISO 15681-2
SM 4500-NH3 F
UNE-EN ISO 8467
UNE-EN ISO 6878
+ 3 more
EUROFINS LABORATOIRE CENTRE
Active
DIN EN ISO 21528-2
DIN EN ISO 6888-1
0.95) based on BS ISO 21527-2:2008
DIN EN ISO 6888-2
DIN ISO 16649-2
+ 3 more
DIN EN ISO 17294-2
DIN EN ISO 13395
NF T 90-412
NF U47-101
DIN EN ISO 7899-1
+ 3 more
DIN ISO 11665-4
DIN EN ISO 7932
DIN 53483-2
DIN EN ISO 15213-2
NF V08-050
+ 3 more
EUROFINS LABORATOIRE NORD
Active
DIN EN ISO 6888-1
DIN EN ISO 21528-2
DIN EN ISO 6888-2
DIN ISO 16649-2
NF V08-054
+ 3 more
DIN EN ISO 21528-1
NF V08-401
DIN ISO 16649-1
DIN EN ISO 6888-1
DIN EN ISO 21528-2
+ 3 more
EUROFINS LCDI
Active
DIN EN ISO 13395
DIN EN ISO 10304-1
ISO 5815-1
NF T90-015-1
DIN EN ISO 10523
+ 3 more
NF X 43-269
NF X 43-050
ISO
ISO 16000-7
DIN EN ISO 1135-4
DIN EN 13744
IEC 62623: 2012
DIN EN 13746
Sound Attenuation EN ISO 4869-1:2018
+ 3 more
ISO 14389
BS EN ISO 14362-1
BS EN ISO 14362-3
UNE-EN ISO 14362-1
UNE-EN ISO 14362-3
+ 3 more
EXOLUM CORPORATION
Active
UNE-EN ISO 20884
UNE-EN ISO 12185
UNE-EN ISO 12156-1
ASTM D 93
ASTM D 2622
+ 3 more
EXcorLab
Active
DIN EN ISO 1135-4
EN ISO 1135-5
DIN EN ISO 10993-1
DIN EN ISO 8637-1
DIN EN ISO 7199
+ 2 more
Eckert & Ziegler Nuclitec
Active
Aktivität
20 Bq
> 20 Bq
Spezifische Aktivität
radioaktiver Lösungen 20 Bq·g
+ 3 more
Efectis Nederland
Active
ISO 5660-1
DIN EN 1365-1
EN 13381-4
DIN EN 1634-1
EN 1365-2
+ 3 more
Efectis UK/Ireland
Active
EN 1364-3
DIN EN 1366-4
EN 1364-4
BS 476-21
BS 476-22
+ 3 more
Elektro Struß
Withdrawn
Gleichspannung 30 mV
/ Messgeräte
> 0,33 V
> 3,3 V
> 33 V
+ 3 more
Elektro Wilhelm
Active
Taupunkttemperatur
für Widerstands- ˃ 500 °C
- Direktanzeigende Thermometer
Thermoelemente ˃ 500 °C
Widerstands- -50 °C
+ 3 more
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