Scope
ISO 3746:2010
Sound Power Level — Survey Method
This test determines sound power levels of noise sources using an enveloping measurement surface and sound pressure level measurements. It is a survey-grade method suitable for field measurements of machinery, equipment, and industrial sources in moderately reflective environments. The method is widely used for noise compliance verification, product development, and environmental impact assessments. Accredited testing ensures consistent, defensible results for regulatory compliance and product labeling. This method bridges the gap between laboratory-grade precision and practical field measurements.
What it measures
- Sound power level (Lw) in decibels
- A-weighted and frequency-weighted sound power
- Directional sound power distribution
- Acoustic performance of noise sources
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DIN EN ISO 3744
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BS EN ISO 3744
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NF EN ISO 3744
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UNI EN ISO 3744
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UNE EN ISO 3744
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NEN EN ISO 3744
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DIN EN ISO 3745
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BS EN ISO 3745
🇫🇷
NF EN ISO 3745
🇮🇹
UNI EN ISO 3745
🇪🇸
UNE EN ISO 3745
🇳🇱
NEN EN ISO 3745
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Obligat anaerobe Bakterien
Grampositive aerobe und
anaerobe Kokken
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automatische Zelldifferenzierung
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Melutec Metrology
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Parallelendmaße * 0,5 mm
DIN EN ISO 3650:1999
Parallelendmaße
> 100 mm
Messschieber für Außen-, 0 mm
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Meridian Technical Services
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BS EN 14876:2007/Internal proceduresDiss
BS EN ISO 18119:2018+A1:2021
BS EN ISO 22434:2011
BS EN ISO 10460:2018
BS EN ISO 13769:2018
tungsten carbide)
Plain ring gauges (taper)
Straight edges
LENGTH (cont’d)
Squares
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Metrolution
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Metrosoft CM, Software einer Raumdiagona
AG, Chur, CH ≤ 3333 mm
Oberkochen, D
GmbH, Wetzlar, D
AG, Chur, CH ≤ 7500 mm
Mettler-Toledo
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Kolbenhubpipetten
Manuell betätigte
spritzen
Mehrfachdispenser
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MeßTechnikNord
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- Gleichspannung
Messverstärker > 120 mV
> 1 V
> 12 V
> 1000 V
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Micro Precision (Midlands)
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LENGTH
Caliper
Depth BS 6468: 2008, 0 to 300
Depth
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Microtech Gefell
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Akustische Messgrößen
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(DIN EN 61094-4:1996)
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Microtech Services (Wessex)
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ASTM B212-21
ASTM E1019-24
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Ministry of Defence
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Specific Values
Specific values (continued)
ELECTRICAL
Other Values
AC CURRENT
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Mitutoyo Deutschland
Active
Parallelendmaße 0,5 mm
DIN EN ISO 3650:1999
Parallelendmaße
> 10 mm
Parallelendmaße > 100 mm
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Mobiler Kalibrierdienst Fini
Active
Gleichspannung 3 mV
Messgeräte 10 mV
> 100 mV
> 220 mV
> 11 V
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IEC 61000-4-7
IEC 61000-4-15
IEC 61000-4-30
IEC 61400-21
IEC 61400-21-1
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Temperatur 50 °C
Railway brake handbooks (UIC 547)
1) In den CMC sind die erweiterten Messu
Moorcroft Controls
Active
DC CURRENT
Gas pressure (gauge)
ELECTRICAL
DC VOLTAGE
Measurement
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IEC 61000-4-2: 2008
VDE 0847-4-2
IEC 61000-4-3: 2006
VDE 0847-4-3
IEC 61000-4-4: 2012
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