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 1,851–1,868 of 1,868 labs

iocto

Active
DAkkS D-K-21204-01-00 Hofheim am Taunus, DE
Taupunkttemperatur direktanzeigende −45 °C Railway vehicle body structural requirem Widerstandssensor direktanzeigende > 200 °C + 3 more
View Profile

labopart - Medizinische Laboratorien

Active
DAkkS D-ML-13309-01-00 Dresden, DE
Basophile Eosinophile Erythrozyten Hämatokrit Leukozyten + 3 more
View Profile

Infektiologikum Fachärzte für Innere Medizin, Mikrobiologie, Virologie und Infektionsepidemiologie sowie Laboratoriumsmedizin

Active
DAkkS D-ML-19652-01-00 Frankfurt, DE
Großes Blutbild TSH Immunglobulin E 25-OH-Vitamin D Vitamin B12 + 3 more
View Profile

materia services

Active
DAkkS D-K-22604-01-01 Neumünster, DE
Kraft (WPM) Vibration measuring instruments — test m Werkstoffprüfmaschinen Acoustics — tonality assessment (DIN 456 Measurement of traffic noise immissions + 3 more
View Profile

mib Medizinisches Infektiologiezentrum Berlin

Active
DAkkS D-ML-13067-01-00 Berlin, DE
Basophile Eosinophile Erythrozyten Hämatokrit Leukozyten (Zellzahl) + 3 more
View Profile

qbig

Active
DAkkS D-K-21619-01-00 Leer, DE
Durchflussmess- 13 m³/h - Hochspannungsmessgrößen > 25 m³/h Volumendurchfluss > 40 m³/h + 3 more
View Profile

seca

Active
DAkkS D-K-22590-02-01 Hamburg, DE
nichtselbsttätige elektronische Waagen − Waagen
View Profile

steep GmbH EMV-Zentrum

Active
DAkkS D-PL-12064-01-01 Bonn, DE
DIN EN 55016-1-4 VDE 0877-16-1-4 DIN EN 55016-2-1 VDE 0877-16-2-1 DIN EN 55016-2-2 + 3 more
View Profile

synlab Medizinisches Versorgungszentrum Labor München Zentrum

Active
DAkkS D-ML-13149-01-00 München, DE
Blutungszeit 5-Hydroxyindolessigsäure Aminosäuren Carbohydrate-Deficient-Transferrin Everolimus + 3 more
View Profile

tech-team Kalibrierlabor

Active
DAkkS D-K-15210-01-00 München, DE
Gleichspannung 0,01 V Messgeräte 0,33 V 3,3 V 330 V Gleichstromstärke 30 µA + 3 more
View Profile

tecsis

Active
DAkkS D-K-17205-01-00 Offenbach am Main, DE
Kraft 50 N Kraftaufnehmer und 0,25 kN Kraftmessgeräte 0,5 kN 0,2 kN 1 kN + 2 more
View Profile

ted technologie entwicklungen & dienstleistungen

Active
DAkkS D-PL-21341-01-00 Bremerhaven, DE
DIN 45645-2
View Profile

velotech.de

Active
DAkkS D-PL-17439-02-00 Schweinfurt, DE
DIN EN ISO 4210-1 DIN EN 15194: 2018 DIN 33946 DIN EN 15918 DIN EN ISO 11243 + 3 more
View Profile

wfp Institut für Wellpappenforschung und -prüfung

Active
DAkkS D-PL-17881-01-01 Darmstadt, DE
ISO 534 ISO 536 rs11887534 HABP2-Gen (c.1601G>A) rs7080536 ISO 1974 + 3 more
View Profile

Labor Wisplinghoff

Active
DAkkS D-ML-13062-01-00 Köln, DE
Liste aller Untersuchungsverfahren Webpräsenz des Medizinischen Laboratoriu Cannabinoide (Cannabinol, Cannabidiol) Cannabinoide (THC) Cannabinoide (THC-COOH) + 3 more
View Profile

Überörtliche Berufsausübungsgemeinschaft Fachärzte für Laboratoriumsmedizin und Mikrobiologie

Active
DAkkS D-ML-19859-01-00 Bochum, DE
Adrenalin Amiodaron, Desmethylamiodaron CDT Amiodaron, Desethylamiodaron Dopamin + 3 more
View Profile

Überörtliche Berufsausübungsgemeinschaft MVZ Eberhard & Partner Dortmund

Active
DAkkS D-ML-13403-01-00 Dortmund, DE
11-Desoxycortisol Acylcarnitine Agomelatin Albendazolsulfoxid a-Hydroxy-Alprazolam + 3 more
View Profile

öko-control GmbH - Ingenieurbüro für Arbeitsplatz- und Umweltanalyse

Active
DAkkS D-PL-14367-01-02 Schönebeck (Elbe), DE
DIN EN ISO 5667-1 (A 4) DIN 38402-A 11 DIN EN ISO 5667-3 (A 21) DIN 38402-A 30 DIN EN ISO 7027 (C 2) + 3 more
View Profile

No matching labs found.

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

Other Test Methods

0 labs selected
Compare