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

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DAkkS D-K-21902-01-00 Wilsdruff ST Kesselsdorf, DE
Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO Radiated emissions (CISPR 32) 1) In den CMC sind die erweiterten Messu
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DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN 45641 DIN 45645-1 + 3 more
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DAkkS D-PL-11122-01-00 Kloster Lehnin, DE
DIN EN ISO 10140-1 DIN EN ISO 10140-2 DIN EN ISO 10140-4 DIN EN ISO 10140-5 DIN EN ISO 16283-1 + 3 more
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UKAS 2437 Udaipur 313 003, IN
DIN EN 55022: 2011 CISPR 22 (1997/2006/2008) IEC/CISPR 16-2-1 CISPR 32 (2015) + A1 (2019) AS/NZS CISPR 11:2004 + 3 more
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Yncoris

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DAkkS D-PL-14424-02-00 Hürth, DE
DIN 45645-2
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Z LAB Srl

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ACCREDIA 01046 Cerea, IT
DIN EN ISO 11546-1 UNI EN ISO 9295 DIN EN ISO 11957 ISO 354 ISO 3741 + 3 more
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DAkkS D-ML-18420-01-00 Lübeck, DE
HbA1c Basophile Eosinophile Thrombozyten Lymphozyten + 3 more
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DAkkS D-K-15103-01-01 Königswinter, DE
0,05 V - Gleichstromstärke dreiphasig 60 V; 120 V; 240 V > 240 V einphasig 0,002 V + 3 more
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DAkkS D-K-22359-01-00 Oberursel, DE
Wechselstromstärke 5 mA 5 mA, 10 mA, 20 mA 40 mA, 80 mA, 150 mA 240 mA, 300 mA, 480 mA 600 mA, 720 mA, 960 mA + 3 more
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DAkkS D-K-23094-01-01 Eisingen, DE
Außengewinde Nenndurchmesser zylindrische Innengewinde − Längenmessgeräte Längenmessmittel Länge + 3 more
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DAkkS D-PL-22057-01-01 Ludwigsburg, DE
DIN EN ISO 4210-1 DIN EN ISO 11243 ISO 5775-1 DIN EN 16054 DIN EN 1371-1 + 3 more
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DAkkS D-ML-13013-01-00 Chemnitz, DE
Thrombozytenfunktion Ristocetin) Thrombozytenaggregation Arachidonsäure, Epinephrin, Kollagen, Ri 17-alpha-Hydroxy-Progesteron + 3 more
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DAkkS D-ML-13117-01-00 Regensburg, DE
angeborener Chromosomensatz 22q11.2-Mikrodeletionssyndrom (22q11.2) Kopienzahlveränderungen (Regionen laut MLPA-Kit) + 3 more
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DAkkS D-K-15186-01-01 Bitterfeld-Wolfen, DE
- Gleichspannung Railway vehicles — specific test require Quellen - Gleichstromstärke / Messgeräte + 3 more
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DAkkS D-K-15186-01-02 Bitterfeld-Wolfen, DE
Masse oder Konventioneller Wägewert/ Massenormale* Massenormale* > 100 g + 3 more
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DAkkS D-ML-13153-01-00 Jena, DE
Angelmann-Syndrom (15q11-q13 Region) Prader-Willi-Syndrom (15q11-q13 Ausschluss/ Nachweis mütterlicher Zellen im pränatalen + 3 more
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DAkkS D-K-18080-01-00 Friedrichshafen, DE
Parallelendmaße 0,5 mm DIN EN ISO 3650:1999 Parallelendmaße * 0,5 mm Parallelendmaße Parallelendmaße > 100 mm + 3 more
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DAkkS D-K-19937-01-02 Losheim am See, DE
Railway brake — anti-slide device (UIC 5 Messgeräte im Kraftfahrwesen − Rollenbremsprüfstände − Plattenbremsprüfstände − Scheinwerfer-Einstell-Prüfsystem + 3 more
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ZwickRoell

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DAkkS D-K-18351-01-00 Ulm, DE
Absolutdruck p * Kraftmesseinrichtungen von Werkstoffprüfmaschinen Acoustics — tonality assessment (DIN 456 Auflagekraft von Fallmassen + 3 more
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DAkkS D-ML-13280-01-00 Hamburg, DE
Thombozyten-Funktionstest 10-OH-Carbazepin 11-Deoxycorticosteron 11-Deoxycortisol 21-Deoxycortisol + 3 more
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DAkkS D-ML-13432-01-00 Würzburg, DE
Automatisches Blutbild Erythrozytenzahl Hämatokrit Hämoglobin Hb im einzelnen Erythrozyten + 3 more
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DAkkS D-ML-13131-02-01 Hannover, DE
HbA1c Basophile Eosinophile Basophile Granulozyten Lymphozyten + 3 more
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DAkkS D-ML-13131-01-01 Göttingen, DE
Homovanillinsäure Vanillin-Mandelsäure 5-Hydroxyindolessigsäure VLCFA Phytansäure + 3 more
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DAkkS D-ML-20928-01-01 Jena, DE
Albumin Alkalische Phosphatase Alpha-Amylase AT3 Bilirubin, direkt + 3 more
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DAkkS D-ML-13318-01-00 Halle (Saale), DE
HbA1c CDT Vitamin B1 Vitamin B6 Vitamin A + 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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