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
1,868 Accredited labs
20 Countries

Showing 151–175 of 906 labs

DAkkS D-K-18808-01-01 Wendlingen, DE
Sound intensity — scanning method (ISO 9 Härteprüfmaschinen Kraft einrichtungen * Vibration measuring instruments — test m + 3 more
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ETAS

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DAkkS D-K-19158-01-00 Stuttgart, DE
- Gleichspannung Quellen und Messgeräte > 1 mV bis > 10 mV bis > 100 mV bis > 10 V bis + 3 more
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EXcorLab

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DAkkS D-PL-19275-02-01 Obernburg, DE
DIN EN ISO 1135-4 EN ISO 1135-5 DIN EN ISO 10993-1 DIN EN ISO 8637-1 DIN EN ISO 7199 + 2 more
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DAkkS D-K-15203-01-01 Braunschweig, DE
Aktivität 20 Bq > 20 Bq Spezifische Aktivität radioaktiver Lösungen 20 Bq·g + 3 more
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DAkkS D-K-15196-01-01 Nordenham, DE
Gleichspannung 30 mV / Messgeräte > 0,33 V > 3,3 V > 33 V + 3 more
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DAkkS D-K-20306-01-00 Weinstadt, DE
Taupunkttemperatur für Widerstands- ˃ 500 °C - Direktanzeigende Thermometer Thermoelemente ˃ 500 °C Widerstands- -50 °C + 3 more
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DAkkS D-K-15020-04-01 Norderstedt, DE
/ Messgeräte 0,001 V > 0,22 V > 2,2 V > 22 V + 3 more
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DAkkS D-K-15180-01-01 Wiesloch, DE
Elektrische Messgrößen Gleichstrom- und Niederfrequenzmessgröße Railway brake — magnetic track brakes (U − Gleichspannung − Gleichstromstärke + 3 more
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Elster

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DAkkS D-K-19495-01-01 Mainz-Kastel, DE
Durchfluss von Gasen 0,5 m³/h Volumendurchfluss > 4 m³/h Railway overhead lines — pantograph head > 10 m³/h + 3 more
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DAkkS D-PL-18838-02-01 Riedering, DE
DIN EN ISO 14607 DIN EN 13687-2 DIN EN ISO 15912 ASTM E290-22 DIN EN ISO 19023 + 3 more
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DAkkS D-K-19095-01-00 Weil am Rhein, DE
Railway brake — magnetic track brakes (U Railway brakes — conditions for homologa − Durchfluss von Flüssigkeiten Railway brakes — estimation of braking f − Masse strömender Flüssigkeiten + 3 more
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DAkkS D-PL-15172-01-00 Maulburg, DE
IEC 61000-4-2: 2008 IEC 61000-4-3: 2006 IEC 61000-4-4: 2012 IEC 61000-4-5: 2005 IEC 61000-4-6: 2013 + 3 more
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DAkkS D-PL-11054-01-00 Dresden, DE
CDC73 (NM_000384: c.1-c.82) ID152 EN ISO 11925-2 DIN EN 350 + 3 more
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DAkkS D-K-21247-01-01 Hemer, DE
Innen- und Tiefenmaße Konventioneller 0,11 G > 2 G > 5 g + 3 more
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Esders

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DAkkS D-K-23123-01-01 Haselünne, DE
Absolutdruck Pabs Druck 0,35 bar > 19 bar Überdruck p 0,35 bar
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Esenwein

Active
DAkkS D-K-15168-01-00 Hochdorf, DE
/ Messgeräte > 220 mV Quellen > 0,2 V 120 V 200 V + 3 more
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DAkkS D-ML-17481-01-01 Gelsenkirchen, DE
Thrombozytenfunktion Agomelatin Amisulprid (Psychopharmaka) Amitriptylin (TZA) Aripiprazol (Neuroleptika) + 3 more
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DAkkS D-ML-17480-01-01 Gelsenkirchen, DE
Thrombozytenfunktion Agomelatin Amisulprid (Psychopharmaka) Amitriptylin (TZA) Aripiprazol (Neuroleptika) + 3 more
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DAkkS D-PL-19438-01-00 Schwerte, DE
DIN EN 13141-4 DIN EN 13141-6 DIN EN 13141-7 DIN EN 13141-8 DIN EN 13141-11 + 3 more
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DAkkS D-ML-20007-01-00 Duisburg, DE
Glykohämoglobin A1C (HbA1c) Basophile Granulozyten Eosinophile Granulozyten Erythrozytenverteilungsbreite (RDW) + 3 more
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DAkkS D-ML-18340-01-00 Oberhausen, DE
Blutzellen Basophile Granulozyten Basophile Granulozyten, Eosinophile Gran Eosinophile Granulozyten, Erythrozyten, Basophile Leukozyten, absolut + 3 more
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DAkkS D-PL-21199-01-01 Kitzingen, DE
DIN EN ISO 1798 DIN EN ISO 1856 Myopathie, Nemaline (TyP1, 3-10: DIN EN ISO 14125 DIN EN ISO 179-1 + 3 more
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DAkkS D-PL-17354-01-00 Zwickau, DE
ISO 16750-3 DIN EN 60068-2-53 DIN EN 60068-2-64 ISO 20653 ISO 16750-4 + 3 more
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DAkkS D-K-19502-01-01 Furtwangen, DE
Frequenz - Gleichspannung Spannungsquellen 5 µV 1 mV Messgeräte > 10 mV + 3 more
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DAkkS D-PL-17362-01-01 Freiberg, DE
DIN ISO 48-4 ISO 21527-1 ISO 21527-2 DIN EN ISO 527-3 rs2066844 + 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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