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

🇩🇪 DIN EN ISO 3744 🇬🇧 BS EN ISO 3744 🇫🇷 NF EN ISO 3744 🇮🇹 UNI EN ISO 3744 🇪🇸 UNE EN ISO 3744 🇳🇱 NEN EN ISO 3744 🇩🇪 DIN EN ISO 3745 🇬🇧 BS EN ISO 3745 🇫🇷 NF EN ISO 3745 🇮🇹 UNI EN ISO 3745 🇪🇸 UNE EN ISO 3745 🇳🇱 NEN EN ISO 3745

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Ministry of Defence

UKAS 0509 Negara, BN

Specific Values Specific values (continued) ELECTRICAL Other Values AC CURRENT + 3 more

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ISO 3744 Determination of sound power levels of noise sources using sound pressure — Precision method in anechoic and hemi-anechoic rooms
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ISO 3747 Determination of sound power levels of noise sources using sound intensity — In-situ method using a reference sound source
ISO 9614-1 Determination of sound power levels of noise sources by sound intensity — Part 1: Measurement at discrete points