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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VALEO ELECTRIFICATION - Laboratoire d'essais et de validations

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COFRAC 1-6561 Sainte-Florine, FR
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VDE Prüf- und Zertifizierungsinstitut

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VEGA Environmental Consultants

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UKAS 1634 Whitley Bay, GB
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VERIFICACIONES INDUSTRIALES DE ANDALUCIA, S.A. (VEIASA)

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ENAC LC10.112 Sevilla, ES
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VERIFICACIONES Y CERTIFICACIONES TÉCNICAS

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ENAC LE2110 Castellón de la Plana, ES
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VHT Institut für Leichtbau Trockenbau Holzbau

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Vectoflow

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DAkkS D-K-21643-02-00 Gilching, DE
am Standort Vectoflow Windtunnel A, Frie Strömungsgeschwindigkeit von Gasen 15 m/s bis > 38 m/s
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Vincentius-Diakonissen-Kliniken gemeinnützige AG Zentrallabor

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Blutbild, kleines (Erythrozyten, Leukozy Erythrozyten Leukozyten Retikulozyten Thrombozyten + 3 more
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UKAS 10213 Bishops Stortford, GB
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Vintec Laboratories

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UKAS 1249 Garston, GB
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Vistec Electron Beam

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− Permanentes Laboratorium Positionen und Abstände gleichgerichteter Kanten positionen von Strukturen (Hartschichtmasken) + 3 more
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W H Stephens

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UKAS 7855 Belfast, GB
(HSG 264, 2012)
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WENZEL Metrology

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DAkkS D-K-17723-01-00 Wiesthal, DE
Koordinatenmessgeräte von <7000 mm under-Edge, UK INCA3D, Software von Inspect 3D, Cholet, F + 3 more
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WIKA Alexander Wiegand SE &

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WIN Messmittel und Service

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− Parallelendmaße − Längenmessmittel − Durchmesser − Formabweichung − Gewinde + 3 more
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WIND - consult Ingenieurgesellschaft für umweltschonende Energiewandlung

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IEC 61400-12-1 IEC 61400-12-2 IEC 61400-12-3 IEC 61400-12-5 IEC 61400-12-6 + 3 more
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WSP UK

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UKAS 2538 London, GB
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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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