ISO 3747:2010

Sound Power Level — In-Situ Reference Source Method

This engineering/survey method determines sound power levels using a calibrated reference sound source to account for acoustic environmental conditions during in-situ measurements. It is particularly useful for large or immobile equipment where laboratory testing is impractical, and for on-site verification of noise compliance. The reference source approach compensates for acoustic environmental effects, improving accuracy compared to basic survey methods. Accreditation ensures proper reference source maintenance and measurement protocols are followed. This method is essential for field acceptance testing and environmental noise assessments.

What it measures

  • Sound power level (Lw) referenced to 1 pW
  • A-weighted and frequency-weighted sound power
  • Environmental acoustic correction factors
  • In-situ acoustic performance
🇩🇪 DIN EN ISO 3746 🇬🇧 BS EN ISO 3746 🇫🇷 NF EN ISO 3746 🇮🇹 UNI EN ISO 3746 🇪🇸 UNE EN ISO 3746 🇳🇱 NEN EN ISO 3746 🇩🇪 DIN EN ISO 9614-1 🇬🇧 BS EN ISO 9614-1 🇫🇷 NF EN ISO 9614-1 🇮🇹 UNI EN ISO 9614-1 🇪🇸 UNE EN ISO 9614-1 🇳🇱 NEN EN ISO 9614-1
1,868 Accredited labs
20 Countries

Showing 326–350 of 906 labs

DAkkS D-PL-22819-01-00 Lüdenscheid, DE
DIN 40050-9 IEC 60068-2-2 IEC 60068-2-6 DIN EN IEC 60068-2-13 DIN EN 60068-2-14 + 3 more
View Profile
DAkkS D-ML-13173-01-00 Bad Oeynhausen, DE
Thrombozytenfunktion Amiodaron/Desethylamiodaron Cotinin Cyclosporin A Everolimus + 3 more
View Profile
DAkkS D-ML-21357-01-00 Heppenheim, DE
Albumin Alkohol ALP Anti-Faktor Xa (Fragmin) AT3 + 3 more
View Profile
DAkkS D-PL-19181-01-00 Winnenden, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 13487 DIN 45635-46 + 2 more
View Profile
DAkkS D-K-15009-01-01 Leipzig, DE
Eindringkörper für 75° Sound system equipment — speech transmis Länge der Schnittlinien * Vergrößerungsnormale Abflachung bis 300 + 3 more
View Profile
DAkkS D-K-15082-01-00 Hamburg, DE
Durchfluss von Gasen 17 mL/s transferstandards Strömungswiderstand 5 mL/min 15,0 mL/min Laminar Flow Elemente 17 mL/min + 3 more
View Profile
DAkkS D-PL-22893-01-00 Rheine, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 61400-11 ISO 9613-2
View Profile
DAkkS D-K-17059-02-01 Dresden, DE
Messschieber für Außen-, 0 mm Innen- und Tiefenmaße > 300 mm Tiefenmessschieber 0 mm Höhenmessschieber 0 mm + 3 more
View Profile
DAkkS D-ML-13087-01-00 Schüttorf, DE
10-Hydroxycarbazepin (MHD) Amiodaron, Desmethylamiodaron Clozapin, Norclozapin Cyclosporin A Amiodaron, Desethylamiodaron + 3 more
View Profile
DAkkS D-ML-13087-02-00 Leer, DE
HbA1c Basophile Eosinophile Erythrozyten Hämatokrit + 3 more
View Profile
DAkkS D-ML-17171-01-01 Baden-Baden, DE
HbA1c HCG qualitativ Erythrozyten Granulozyten basophil Granulozyten eosinophil + 3 more
View Profile
DAkkS D-ML-20249-01-00 Braunschweig, DE
HbA1c Retikulozyten Leukozyten Kleines Blutbild Großes Blutbild = + 3 more
View Profile
DAkkS D-ML-13183-01-00 Bremen, DE
HbA1c Zellzahl Blutbild groß Blutbild klein Retikulozyten + 3 more
View Profile
DAkkS D-ML-13107-01-00 Geesthacht, DE
Thrombozytenfunktionstest 2-Desoxypipradol (2-DPMP) 2-oxo-3-hydroxy-LSD 3.4-DMMC 3-Fluormethcathinon + 3 more
View Profile
DAkkS D-ML-13109-01-01 Hannover, DE
HbA1c Basophile Granulozyten Eosinophile Granulozyten Erythrozyten Hämatokrit + 3 more
View Profile
DAkkS D-ML-13319-02-01 Neuruppin, DE
Liste aller Untersuchungsverfahren Webpräsenz des Medizinischen Laboratoriu HbA1c Basophile Eosinophile + 3 more
View Profile
DAkkS D-ML-13132-01-00 Flintbek, DE
HbA1c Retikulozyten Leukozyten Neutrophile Granulozyten Lymphozyten + 3 more
View Profile
DAkkS D-ML-13194-01-01 Recklinghausen, DE
Blutsenkung Benzol Ethylbenzol Aceton, Isopropanol, Methanol Ethanol + 3 more
View Profile
DAkkS D-ML-13194-01-00 Recklinghausen, DE
Blutsenkung Benzol Ethanol Ethylbenzol Aceton, Isopropanol, Methanol + 3 more
View Profile
DAkkS D-K-18673-01-01 Dresden, DE
Gleichspannung 1 mV bis 10 mV Messgeräte > 10 mV bis 100 mV > 100 mV bis 220 mV > 220 mV bis 2,2 V > 2,2 V bis 11 V + 3 more
View Profile
DAkkS D-PL-17126-01-00 Nürnberg, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN 45645-2 DIN ISO 12884 + 3 more
View Profile
DAkkS D-PL-14165-01-00 Oldenburg, DE
DIN EN 13040 DIN EN 12580 DIN EN 13039 DIN EN 13037 DIN EN 13038 + 3 more
View Profile

Labor 28 MVZ

Active
DAkkS D-ML-17085-01-00 Berlin, DE
Thrombozytenfunktionstest 5-Hydroxyindolessigsäure Amiodaron, Desethylamiodaron Tricyclische Antidepressiva Kohlenhydratdefizientes + 3 more
View Profile
DAkkS D-ML-19783-03-00 Augsburg, DE
Thrombozytenaggregation a-Hexachlorcyclohexan 2-Butanon Aceton Benzol + 3 more
View Profile
DAkkS D-ML-13272-01-00 München, DE
Drogenscreening-Qualitativer Anti-HCV-Bestätigungstest Benzodiazepine, Kokain, Opiate, Buprenor Organische Säuren Neuroleptika, Antidepressiva + 3 more
View Profile

No matching labs found.

Industries

Large industrial machinery and installation testing Environmental noise assessment and monitoring Building and construction equipment Transportation and railway noise evaluation Ventilation and HVAC system commissioning

Related Standards

  • ISO 3746 Determination of sound power levels of noise sources using sound pressure — Survey method
  • ISO 9614-1 Determination of sound power levels of noise sources by sound intensity — Part 1: Measurement at discrete points
  • ISO 12639 Acoustics — Reference sound sources for in-situ calibration of sound pressure and sound intensity measurement apparatus

Other Test Methods

0 labs selected
Compare