Scope
ISO 3747:2010
Sound Power Level โ 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
๐ฉ๐ช
DIN EN ISO 3746
๐ฌ๐ง
BS EN ISO 3746
๐ซ๐ท
NF EN ISO 3746
๐ฎ๐น
UNI EN ISO 3746
๐ช๐ธ
UNE EN ISO 3746
๐ณ๐ฑ
NEN EN ISO 3746
๐ฉ๐ช
DIN EN ISO 9614-1
๐ฌ๐ง
BS EN ISO 9614-1
๐ซ๐ท
NF EN ISO 9614-1
๐ฎ๐น
UNI EN ISO 9614-1
๐ช๐ธ
UNE EN ISO 9614-1
๐ณ๐ฑ
NEN EN ISO 9614-1
1,670
Accredited labs
18
Countries
Showing 101โ125 of 349 labs
DIN EN 933-11
DIN EN 12390-3
DIN EN 933-3
DIN EN 12390-7
DIN EN 12697-5
+ 3 more
DC CURRENT
LENGTH
DC Resistance
DC VOLTAGE
Cold junction compensation
+ 3 more
Corserv Solutions
Active
DIN EN 933-1
(PCM) based on HSG 248
(HSG 248) โ 2021
DIN EN 932-1
DIN EN 932-2
+ 3 more
requirements of BS EN 15259:2007
IEC 60519-11
Based on EN 14791:2017
DIN EN 13284-1
BS EN BS EN ISO 21877:2019
+ 3 more
Gas pressure (absolute)
Gas pressure (gauge)
Hydraulic pressure (gauge)
Hydraulic Pressure (absolute)
PRESSURE (contโd)
+ 1 more
DNKA
Active
staining based on HSG 248.
(PCM) based on HSG 248
(HSG 248) โ 2021
QSOP 03 based on HSG 248
QSOP 01 based on HSG 248
Decus Research
Active
1) MS08P based on BS EN ISO
MS02P based on BS EN ISO
MS03P based on BS EN ISO
MS06P based on BS EN ISO
MF07P based on BS EN ISO
+ 3 more
Devonport Royal Dockyard
Active
Specific Values 1 ๏
RF Power
RF Attenuation 10 MHz to 1 GHz
Other values -20 dBm to +20 dBm
Devonport Royal Dockyard
Active
BS 4206:1967 (superseded)
ISO 5173
ISO 7438
BS EN ISO 9606-2:2004
BS 131-5:1965
+ 3 more
Diatec Diagnostics
Active
AUDIOMETRIC EQUIPMENT
Attenuator linearity
Microphones
EAR SIMULATORS
Class LS, 1 and 2
Druck
Active
Gas pressure (absolute)
Hydraulic pressure (gauge)
Gas pressure (gauge)
(At low current)
Specific values (continued)
+ 3 more
DynaGreen Environmental UK
Active
DIN EN 14791
IEC 60519-11
BS EN ISO 16911-1:2013 using
DIN EN 14792
DIN EN 13126-19
+ 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)
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
+ 3 more
Efectis UK/Ireland
Active
EN 1364-3
DIN EN 1366-4
EN 1364-4
BS 476-21
BS 476-22
+ 3 more
No matching labs found.