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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SPEKTRA Schwingungstechnik und Akustik GmbH Dresden

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DAkkS D-K-15183-01-02 Dresden, DE
Akustische Messgrößen* Schalldruckpegel (Freifeld), (bezogen au Freifeld-Leerlauf- oder 125 Hz ˃ 250 Hz mit / ohne Windschirm > 8 kHz + 3 more
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SPS electronic

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DAkkS D-K-20497-01-01 Twist, DE
- Gleichspannung Messgeräte 1 mV > 330 mV 3,3 V Messgeräte 0,33 V + 3 more
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SSW Prüfsysteme und Service GmbH Weißberg

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DAkkS D-K-17475-01-00 Hilden, DE
Vibration measuring instruments — test m Vibration measurements near traffic — me Härteprüfmaschinen Acoustics — tonality assessment (DIN 456 Noise measurement on railway vehicles — + 3 more
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ST GOBAIN GLASS France - Saint-Gobain Research Compiègne

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COFRAC 1-1374 Thourotte, FR
DIN EN ISO 10140-1 DIN EN ISO 717-1 DIN EN ISO 10140-2 DIN EN ISO 10140-4 DIN EN ISO 10140-5
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STEARO

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COFRAC 1-7174 Velaux, FR
DIN EN 12469 NF S 90-351 BS EN ISO 14644-1:2015 ISO 14644-3
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SYNLAB GHANA

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DAkkS D-ML-20424-01-00 Accra, DE
Alpha-Fetoprotein Beta Human Chorionic Gonadotrophin (BHCG), quantitative CA 125 CEA + 3 more
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SYNLAB MVZ Augsburg

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DAkkS D-ML-13225-01-01 Augsburg, DE
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SYNLAB MVZ Dachau GmbH SYNLAB Gauting Zweigniederlassung der SYNLAB MVZ Dachau

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SYNLAB MVZ Hessen GmbH Standort Kassel

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SYNLAB MVZ Weiden GmbH Medizinisches Versorgungszentrum Regensburg

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DAkkS D-ML-13014-06-01 Regensburg, DE
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SYNLAB MVZ Weiden GmbH SYNLAB Medizinisches Versorgungszentrum Nürnberg

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DAkkS D-ML-13014-02-01 Nürnberg, DE
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SYNLAB Medizinisches Versorgungszentrum Augsburg

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DAkkS D-ML-13225-01-00 Augsburg, DE
HbA1c β-HCG Blutbild, automatisch Differentialblutbild, automatisch Hb-Äquivalent der Retikulozyten + 3 more
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SYNLAB MVZ Humangenetik München

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DAkkS D-ML-13225-07-00 München, DE
angeborener Chromosomensatz partieller angeborener partieller Chromosomensatz (zur Abklärung bekannter familiärer Chromosomenveränderung) + 3 more
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SYNLAB Medizinisches Versorgungszentrum Berlin

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DAkkS D-ML-13202-01-00 Berlin, DE
HbA1c Blutbild, maschinell Differentialblutbild, maschinell Zellzählung Retikulozyten, maschinell + 3 more
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SYNLAB Medizinisches Versorgungszentrum Ettlingen

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DAkkS D-ML-13095-01-00 Ettlingen, DE
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SYNLAB Medizinisches Versorgungszentrum Hamburg

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SYNLAB Medizinisches Versorgungszentrum Heidelberg

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SYNLAB Medizinisches Versorgungszentrum Humangenetik Freiburg

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DAkkS D-ML-21093-01-01 Freiburg, DE
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SYNLAB Medizinisches Versorgungszentrum Humangenetik Mannheim

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SYNLAB Medizinisches Versorgungszentrum Jade-Weser

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DAkkS D-ML-18938-01-01 Varel, DE
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SYNLAB Medizinisches Versorgungszentrum Trier

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DAkkS D-ML-13122-01-00 Trier, DE
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SYNLAB Medizinisches Versorgungszentrum Trier GmbH Zweigniederlassung SYNLAB Medizinisches Versorgungszentrum Neuwied

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DAkkS D-ML-13122-02-00 Neuwied, DE
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SYNLAB Medizinisches Versorgungszentrum Weiden

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DAkkS D-ML-13014-01-00 Weiden, DE
Aceton, Isopropanol, Methanol Ethanol (Morphin, 6-Monoacetyl-morphin, Codein u Quantitative Bestätigungsanalyse Barbiturate (qualitative + 3 more
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SYNLAB Medizinisches Versorgungszentrum Weiden GmbH Medizinisches Versorgungszentrum Nürnberg

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DAkkS D-ML-13014-02-00 Nürnberg, DE
HbA1c Mittlere Blutglucose Aktivitätskonzentration Blutsenkung % Hyperchrome Erythrozyten + 3 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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