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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COFRAC 1-2262 Mainvilliers, FR
DIN EN 12469 NF S 90-351 BS EN ISO 14644-1:2015 ISO 14644-3
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NF X 43-269 NF X 43-269 - Annexe K NF X 43-298 NF X 43-259 ISO 22262-1 + 3 more
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DIN EN ISO 6508-1 ASTM E8/E 8M DIN EN ISO 643 EN ISO 12624 ISO 4967 + 3 more
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EN 13819-2:2020 DIN 53521 DIN EN 13522 DIN 45635-23 Sizing, Range of fitting, Resistance to + 3 more
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COFRAC 1-0130 Lyon Cedex 07, FR
DIN EN 27888 DIN EN ISO 10523 NF X 31-615 (Uniquement prélèvements NF EN ISO 7887 Méthode D DIN EN ISO 9963-1 + 3 more
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COFRAC 1-1970 Chateauneuf Sur Isere, FR
DIN EN 12207 DIN EN 12208 DIN EN 1026 DIN EN 12210 BS EN 14351-1:2006+A2:2016 + 3 more
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NF EN ISO 6892-1 (méthode DIN EN 10164 ASTM E 8 ASTM A 370 DIN EN ISO 6508-1 + 3 more
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NF X 43-050 NF X43-050 (parties ISO 22262-2 NF ISO 22262-1 et/ou ISO 22262-1
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NF X 43-050 NF X43-050 (parties
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NF X 46-032 NF X 43-050 NF X43-050 (parties
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DIN EN ISO 17294-2 DIN EN ISO 7899-1 ISO 5815-1 NF T90-015-1 DIN EN ISO 10523 + 3 more
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NF ISO 21438-3 NF X 43-264 NF ISO 21438-1 NF X 43-259 NF ISO 21438-2 + 3 more
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COFRAC 1-6388 Saint-Martin D'Heres, FR
DIN EN 12469 NF S 90-351 BS EN ISO 14644-1:2015 ISO 14644-3
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NF X 43-269 - Annexe K NF X 43-050 (parties utiles NF X 46-032 NF X 43-269 – Annexe K NF X 43-050 + 1 more
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Industries

Industrial machinery and equipment manufacturing Environmental noise consulting Construction and power tool equipment HVAC and ventilation systems Occupational health and safety

Related Standards

  • ISO 3744 Determination of sound power levels of noise sources using sound pressure — Precision method in anechoic and hemi-anechoic rooms
  • ISO 3745 Determination of sound power levels of noise sources using sound pressure — Precision grade method for anechoic rooms and free fields over a reflecting plane
  • 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

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