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
🇳🇱
NEN EN ISO 9614-1
1,670
Accredited labs
18
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Showing 401–425 of 1,670 labs
EDISON NEXT ENVIRONMENT
Active
DIN EN 14790
ISO 5667-5
DIN EN 14181
DIN EN ISO 16911-1
ISO 5667-11
+ 3 more
BS EN ISO 16283-1:2014+A1:2017BS EN ISO
BS EN ISO 16283-2:2020
BS EN ISO 140-4:1998
ISO 1407
BS EN ISO 9972:2015
+ 1 more
and Appx. 3 of HSG 227 (2004))
in Appendix 5 of HSG 227 (2004)
guides HSG 264 (2012) and
(HSG 264, 2012)
EFFICIENCE ET OPTIMISATION
Active
NF ISO 21438-3
NF X 43-264
NF ISO 21438-1
NF X 43-259
NF ISO 21438-2
+ 3 more
ELANOVA LAB
Active
DIN ISO 1817
DIN EN 15188
DIN ISO 1431-1
DIN EN 14671
DIN EN ISO 10140-2
+ 3 more
ELLAB
Active
Taupunkttemperatur
Widerstandssensor
–100 °C bis
> 140 °C bis
> 240 °C bis
+ 3 more
ELMTEC Ingenieurgesellschaft
Active
- Gleichspannung
Messgeräte > 0,004 V
> 0,33 V
> 33 V
> 330 V
+ 3 more
EMCCons RASEK
Active
- Gleichspannung
> 0,12 V
Vorverstärker > 1,2 V
> 12 V
> 120 V
+ 3 more
200 kg/h ≤ m ≤ 60000 kg/h
200 l/h ≤ Q ≤ 60000 l/h
200 kg/h ≤ m ≤ 30000 kg/h
200 l/h ≤ Q ≤ 30000 l/h
700 Pa ≤ P ≤ 2 MPa
+ 3 more
ENSATEC, S.L. (Unipersonal)
Active
UNE-EN 12211
UNE-EN 12210
UNE-EN 1026
UNE-EN 12207
UNE-EN 14608
+ 3 more
Environmental noise — determination of s
ISO 20906 : 2009-12 :
Railway brake — anti-slide device (UIC 5
Railway brake — magnetic track brakes (U
Railway brakes — conditions for homologa
Railway brakes — disc brake pads (UIC 54
− Durchfluss von Gasen
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EPTA NORD
Active
DIN CEN ISO 15216-2
ISO 19250
AOAC 2012.01 2016
DIN EN ISO 15587-1
EPA 300.1 1997
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UNE-EN 12350-2
UNE-EN 12504-1
UNE-EN 12390-2
UNE-EN 12390-3
UNE-EN 12350-1
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UNE-EN ISO 16283-1
UNE-EN ISO 16283-2
UNE-EN ISO 16283-3
UNE 74201
UNE-EN ISO 3382-2
UNE-EN ISO 6892-1
DIN EN 10002-1
ASTM E 8
ASTM E 208
ASTM E208-06
+ 3 more
ERC Testing
Active
DIN EN 1863-1
BS EN ISO 10077-1:2006
published 2024) for BS EN
DIN EN 1863-2
BS EN ISO 10077-2:2017
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ERGO Umweltinstitut
Active
DIN ISO 10381-5
DIN ISO 18400-102
DIN ISO 18400-104
DIN ISO 18400-105
DIN ISO 18400-203
+ 3 more
ESI Prüftechnik
Active
Sound intensity — scanning method (ISO 9
Härteprüfmaschinen
Kraft
einrichtungen *
Vibration measuring instruments — test m
+ 3 more
ETAS
Active
- Gleichspannung
Quellen und Messgeräte > 1 mV bis
> 10 mV bis
> 100 mV bis
> 10 V bis
+ 3 more
DIN EN ISO 6888-1
0.95) based on BS ISO 21527-2:2008
DIN EN ISO 6888-2
DIN ISO 16649-2
DIN EN ISO 19020
+ 3 more
UNE 64106
BS ISO 6731:2010
UNE-EN ISO 712
UNE-EN ISO 5534
ISO 13580
+ 3 more
DIN EN ISO 14403-2
DIN ISO 11464
DIN ISO 11465
NF T90-105-2
NF T90-004
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