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
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NF EN ISO 3745
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UNI EN ISO 3745
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UNE EN ISO 3745
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NEN EN ISO 3745
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TetraTec Instruments
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Railway brakes — disc brake pads (UIC 54
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0,01 m
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39 mL/h
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- Gleichspannung
Messgeräte 0,001 V bis
0,33 V bis
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330 V bis
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Railway brake — magnetic track brakes (U
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a) nur Vor-Ort-Kalibrierungen
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- Gleichspannung
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10 V; 100 V; 1000 V
> 100 mV
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TÜV NORD CERT
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IEC 61000-4-39
IEC 61000-4-3: 2006
VDE 0847-4-3
IEC 61000-4-4: 2012
VDE 0847-4-4
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DIN EN 50178: 1998
IEC 62040-1
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IEC 60335-1: 2010
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