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 601–625 of 1,868 labs
DIN EN ISO 10304-1
DIN EN ISO 11885
DIN EN ISO 15350
DIN EN ISO 15351
DIN EN ISO 17294-2
+ 3 more
- Gleichspannung
Messgeräte 0,33 V bis < 3,3 V
330 V
Quellen
> 0,1 V
+ 3 more
Kraft (WPM) 30 N
Vibration measuring instruments — test m
maschinen nach DIN
Kraft * 10 N
Acoustics — tonality assessment (DIN 456
+ 3 more
DIN EN ISO 717-1
DIN EN ISO 717-2
DIN EN ISO 10140-1
DIN EN ISO 10140-2
DIN EN ISO 10140-3
+ 3 more
Fraunhofer-Institut für Holzforschung, Wilhelm-Klauditz-Institut WKI Qualitätsprüfung und -bewertung
Active
DIN ISO 16000-3
DIN EN ISO 12460-3
DIN EN ISO 12460-4
DIN EN ISO 12460-5
100 HV 120
+ 3 more
Tensile testing of metallic materials (I
Vickers hardness test (ISO 6507)
Kurzschlussstrom
Solarmodule 16 mA
Gleichstrom- und Nieder- 10 mV
+ 3 more
HbF
HbA1c
HbA2
HBB/HBD
Anti-HBs
+ 3 more
Fugro GB
Active
BS 1377: Part 2: 1990
BS 1377-3:2018 + A1:2021
ASTM D4186-12: 2020
ASTM D5334-22
ASTM D2216-19
+ 3 more
Furness Controls
Active
FLOW
Gas pressure (absolute)
Gas pressure (gauge)
DC CURRENT
TEMPERATURE
+ 3 more
G + B Kalibriertechnik
Active
Druck *
Absolutdruck Pabs
1 bar; 3 bar
Negativer und
positiver Überdruck
+ 3 more
G&L Consultancy
Active
(HSG 248) – 2021
M4 based on HSG 248
(PCM) based on HSG 248
M3 based on HSG 248
(HSG 264, 2012)
+ 1 more
G&M Procter
Active
based on ISO 11133:2014+Amd
dependent) based on BS EN
based on BS EN 12322:1999
G.B.N.S. Partnership
Active
(HSG 248) – 2021
(PCM) based on HSG 248
PRO02 based on HSG 248
DIN EN 12579
DIN 19698-1
DIN 19698-2
DIN 51750-2
DIN ISO 11277
+ 3 more
DIN 38402-A 12
DIN EN ISO 5667-6 (A 15)
DIN 38402-A 30
DIN EN ISO 5667-13 (S 1)
DIN 38414-S 11
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GHMT
Active
DIN EN 50173-1
DIN EN 50173-2
DIN EN 50173-3
DIN EN 50173-4
DIN EN 50173-5
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GIKE
Active
UNE-EN 12390-2
UNE-EN 12350-1
UNE-EN 1744-1
UNE-EN 933-1
UNE-EN 933-8
+ 3 more
GINGER CEBTP
Active
DIN EN 1097-1
DIN EN ISO 10140-2
DIN EN 933-3
DIN EN 1097-2
DIN EN ISO 10140-4
+ 3 more
GINGER LECES
Active
DIN EN 14385
ETSI EN 301 489-1 V2.2.3 2019-11
NF X43-551
IS EN 1948-1:2006 2006
DIN EN 14789
+ 3 more
GIP LABÉO - Site Eure
Active
NF T 90-412
DIN EN ISO 7899-1
NF U47-101
DIN ISO 11465
DIN EN ISO 6888-2
+ 3 more
DIN EN ISO 17294-2
DIN 51750-3
DIN EN ISO 14403-2
NF EN ISO 54321 et
NF T 90-412
+ 3 more
GIP LABÉO - Site Manche
Active
DIN ISO 17289
NF X 31-615
ISO 15648
ISO BS EN 3727-1:2002
ASTM D 7238
+ 3 more
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