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
Countries
Showing 801–825 of 1,868 labs
DC Resistance
AC VOLTAGE (continued)
AC POWER
AC CURRENT
Generation (continued)
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Intek
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DIN EN 60068-2-30
IEC 62080
IEC 61000-6-1
IEC 61000-6-2: 2005
DIN EN 61010-1
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Intertek Caleb Brett GERMANY
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DIN EN ISO 12185
ASTM D 4052
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ASTM D 86
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Intertek Consumer Goods
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IEC 62321-2
DIN EN 61340-4-4
DIN EN 12472
DIN EN 16711-1
DIN EN 1264-5
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IEC 61000-3-2: 2014
IEC 61000-3-3
IEC 61000-3-11: 2017
IEC 61000-3-12: 2011
IEC 61000-4-2: 2008
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Intertek Polychemlab
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DIN EN ISO 10675-1
DIN EN ISO 19458
DIN EN ISO 179-1
NEN 6953
DIN EN ISO 10675-2
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Intona
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and Appx. 3 of HSG 227 (2004))
Executive guides HSG 264 (2012)
(HSG 264, 2012)
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Härte* 20 HRA
Härtevergleichsplatten
20 HRB
20 HRC
40 HRD
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Istituto Giordano SpA
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EN 14304:2009+A1:2013
EN 14305:2009+A1:2013
DIN EN ISO 12623
DIN EN 1873
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J B-Monitor
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(HSG 248) – 2021
No 1 based on HSG 248 – 2021
(PCM) based on HSG 248 – 2021
No 3 based on HSG 248 – 2021
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JCS Technology
Active
ISO 178
BS 5350:Part C13
BS 2782 Part 10 Method 1005
BS EN ISO 14125
MIL-STD 810G:2008 Method 501.5
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JOMA INGENIERÍA Y MONTAJES
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UNE-EN ISO 16283-1
UNE-EN ISO 16283-3
UNE-EN ISO 16283-2
UNE 320001
ISO/IEC 18045
ISO/IEC 15408
CEM ISO
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Jackson and Keay
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BS EN ISO 11623:2015
BS EN ISO 18119:2018+A1:2021
BS EN ISO 10460:2018
BS EN 20745:2020
Charpy impact test (ISO 148-1)
Salt spray / neutral salt fog test (ISO
elektronische Waagen
Innen- und Tiefenmaße
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Javer Labs
Active
MIL-STD-810G, Method 508:7
BS 2011:2.1 Ca:1977
(IEC 60068-2-10:2005+A1:2018,
MIL-STD-810H, Method 508:8
Ebenheitsabweichung
verkörperungen z.B.
platten nach DIN 876:1984
Geradheitsabweichung
ebener Flächen, z.B.
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Johnson and Allen
Active
DC CURRENT
INSPECTION EQUIPMENT
AC CURRENT 50 Hz RMS
uncertainties may be increased.
Johs. Boss
Active
(ein- und mehrgängige
winde mit geradlinigen
unsymmetrischem Profil
0,5 mm bis 6 mm)
Außengewinde Nenndurchmesser
+ 3 more
MIL-PRF-46103E
DIN EN ISO 15106-3
DIN EN ISO 1522
DIN EN ISO 1523
ISO 16935:2007
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Obligat anaerobe Bakterien
mikroaerophile Bakterien
ESBL-Bildner
(multiresistente gramnegative
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CD45 Percp+CD16+56+CD3
CD4
CD45 Percp+CD4+CD8
Adalimumab
Anti-Adalimumab Antikörper
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Jurjanz
Active
Parallelendmaße aus 0,5 mm
DIN EN ISO 3650:1999
Parallelendmaße aus > 100 mm
Messschieber für
1350 mm
+ 3 more
K B Calibration Services
Active
LENGTH
ended (excluding length bars)
Chronic progressive external
Dial gauges and dial test
Caliper Gauges
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