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
🇮🇹
UNI EN ISO 9614-1
🇪🇸
UNE EN ISO 9614-1
🇳🇱
NEN EN ISO 9614-1
1,868
Accredited labs
20
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Showing 1,526–1,550 of 1,868 labs
TUV Rheinland Italia
Active
IEC 60335-2-51
DIN EN 60068-2-30
IEC 61000-6-1
IEC 60335-2-54: 2008
DIN EN 50564
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ISO 6529
DIN EN 13744
DIN EN 16523-1
EN 16523-2
ASTM F739-12e1( withdrawn)
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Technische Universität Darmstadt Staatliche Materialprüfungsanstalt Mess- und Kalibriertechnik
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Railway braking — thermal analysis (EN 1
Railway — traction effort and braking fo
Railway vehicle dynamics — on-track test
Railway brake disc acoustic emissions (E
Railway wheel squeal and curve noise (EN
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Technische Universität München Institut für Medizinische Mikrobiologie, Immunologie und Hygiene
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Staphylokokken
Treponema pallidum (Cardiolipin
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Legionella spp.
Salmonellen, Shigellen, Yersinia
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ISO 15835-2
DIN EN ISO 6506-1
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DIN EN ISO 15630-3
IEC 62301
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& 2: 2008
Leuchtdichte L /
vom Typ L3 Standard
Normfarbwertanteile x , y /
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ISO 3727-1/IDF 80-1:2001
ISO 5534/IDF 4:2004
ISO 6731/IDF 21:2010
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Tecnolab del Lago Maggiore
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ISO 37
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BS EN ISO 6509-1:2014
ISO 815-1
ISO 815-2
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Taupunkttemperatur
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–40 °C bis
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TesT
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maschinen nach DIN
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(PCM) based on HSG 248
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BS 7592:2008, BS 8554:2015
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TetraTec Instruments
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Volumendurchfluss bzw.
0,01 m
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The Auditing Company
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#EN ISO 5164:14
# EN 116-97
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NEN 4400-1
#ISO 6618
DC CURRENT
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DC VOLTAGE
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