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
1,670 Accredited labs
18 Countries

Showing 1,251–1,275 of 1,670 labs

SSW Prüfsysteme und Service GmbH Weißberg

Active
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
View Profile

ST GOBAIN GLASS France - Saint-Gobain Research Compiègne

Active
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
View Profile

SYNLAB GHANA

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

SYNLAB MVZ Augsburg

Active
DAkkS D-ML-13225-01-01 Augsburg, DE
HbA1c Bilirubin Kapillare Ethanol (Blutalkohol) Parvovirus-B19-IgG, -IgM Salmonellen IgA + 3 more
View Profile

SYNLAB MVZ Hessen GmbH Standort Kassel

Active
DAkkS D-ML-20649-01-00 Kassel, DE
HbA1c Großes Blutbild Kleines Blutbild Retikulozyten Natriumchlorid + 3 more
View Profile

SYNLAB MVZ Leinfelden

Active
DAkkS D-ML-13123-01-01 Leinfelden-Echterdingen, DE
HS Omega3 Index Steroidprofil Albendazol Beta Carotin Coenzym Q10 + 3 more
View Profile

SYNLAB MVZ Weiden GmbH SYNLAB Medizinisches Versorgungszentrum Nürnberg

Active
DAkkS D-ML-13014-02-01 Nürnberg, DE
HbA1c Albumin Oestradiol 17ß Cortisol Salmonella spp. + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Augsburg

Active
DAkkS D-ML-13225-01-00 Augsburg, DE
HbA1c β-HCG Blutbild, automatisch Differentialblutbild, automatisch Hb-Äquivalent der Retikulozyten + 3 more
View Profile

SYNLAB MVZ Humangenetik München

Active
DAkkS D-ML-13225-07-00 München, DE
angeborener Chromosomensatz partieller angeborener partieller Chromosomensatz (zur Abklärung bekannter familiärer Chromosomenveränderung) + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Berlin

Active
DAkkS D-ML-13202-01-00 Berlin, DE
HbA1c Blutbild, maschinell Differentialblutbild, maschinell Zellzählung Retikulozyten, maschinell + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Ettlingen

Active
DAkkS D-ML-13095-01-00 Ettlingen, DE
RPR (Cardiolipin) Amiodaron, Desmethylamiodaron Clozapin, Norclozapin HbA1c Cyclosporin A, Everolimus, Sirolimus, Ta + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Hamburg

Active
DAkkS D-ML-21958-01-00 Hamburg, DE
Benzodiazepine Kokain Opiate Amphetamine THC + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Heidelberg

Active
DAkkS D-ML-13129-01-00 Eppelheim, DE
HbA1c Differentialblutbild Erythrozyten Hämatokrit Leukozyten + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Humangenetik Freiburg

Active
DAkkS D-ML-21093-01-01 Freiburg, DE
BTD PAH Prader-Willi-Syndrom (PWS) / (PWS)WS/Angelman-Syndrom (AS) Familiärer Brust- und Eierstockkrebs + 2 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Humangenetik Mannheim

Active
DAkkS D-ML-13293-01-00 Mannheim, DE
ABCC6 Pseudoxanthoma elasticum (PXE) Arterienkalzifikation, generalisierte in ABCC8 Hyperinsulinämische + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Jade-Weser

Active
DAkkS D-ML-18938-01-01 Varel, DE
HbA1c Differentialblutbild, maschinell Kleines Blutbild Retikulozyten, maschinell Zellzahl (Leukozyten, Erythrozyten) + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Trier

Active
DAkkS D-ML-13122-01-00 Trier, DE
Cardiolipin (CMT) HbA1c Basophile Eosinophile Erythrozyten + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Trier GmbH Zweigniederlassung SYNLAB Medizinisches Versorgungszentrum Neuwied

Active
DAkkS D-ML-13122-02-00 Neuwied, DE
HbA1c Kleines Blutbild Großes Blutbild Differentialblutbild Retikulozyten + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Weiden

Active
DAkkS D-ML-13014-01-00 Weiden, DE
Aceton, Isopropanol, Methanol Ethanol (Morphin, 6-Monoacetyl-morphin, Codein u Quantitative Bestätigungsanalyse Barbiturate (qualitative + 3 more
View Profile

SYNLAB Medizinisches Versorgungszentrum Weiden GmbH Medizinisches Versorgungszentrum Nürnberg

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

SYNLAB Medizinisches Versorgungszentrum Weiden GmbH Medizinisches Versorgungszentrum Thüringen

Active
DAkkS D-ML-13014-03-01 Jena, DE
5-Fluorouracil Unverträglichkeit: DPD Mutationen Exon 14 c.1905+1 G>A rs3918290, Exon 11 c.1236G>A rs56038477, Exon 13 c.1679T>G rs55886062, Exon 22 c.2846A>T + 3 more
View Profile

Safety Advice Centre

Active
UKAS 4103 Bangor, GB
M002based on HSG 248 (HSG 248) – 2021 (PCM) based on HSG 248
View Profile

Saliger Gruppe

Active
DAkkS D-K-15008-01-01 Gladbeck, DE
Parallelendmaße 0,5 mm DIN EN ISO 3650:1999 Parallelendmaße aus Wolframkarbid nach Parallelendmaße aus 0,5 mm + 3 more
View Profile

Sarlux S.r.l., Unità Locale Macchiareddu Assemini

Active
ACCREDIA 01160 Assemini, IT
EPA 8015 EPA 3511 2014 EPA 8260 EPA 6020 BS EN ISO 17294-2 + 3 more
View Profile

Schalltechnisches Ingenieurbüro Pies

Active
DAkkS D-PL-23049-01-02 Boppard-Buchholz, DE
DIN EN ISO 16283-1 DIN EN ISO 16283-3 DIN EN ISO 16032 DIN EN ISO 10052 DIN EN ISO 3382-3 + 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