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 1,676–1,700 of 1,868 labs

DAkkS D-ML-13304-08-01 Marburg, DE
Borrelia burgdorferi Chlamydophila pneumoniae Coxiella burnetii Toxoplasma gondii Adenovirus + 3 more
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DAkkS D-ML-13304-10-00 Marburg, DE
Syndrom, Gene: AKT1, PIK3CA, PTEN, SEC23B Carney-Komplex, Gene: PRKAR1A, OMIM*600993, STK11 Cowden-Syndrom, Gene: AKT1, + 3 more
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DAkkS D-ML-13217-01-00 Halle (Saale), DE
Blutgruppe AB0 Rh-Faktor Rh-Formel Kell-Ag A-Untergruppe + 3 more
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DAkkS D-ML-13217-02-00 Halle (Saale), DE
Toxoplasmen-IgG Treponema pallidum-IgG anti-HBc AK anti-HBs AK anti-CMV IgG + 3 more
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DAkkS D-ML-13217-04-00 Halle (Saale), DE
DPYD (SNP-Analyse) JAK2 Kodon 617 Mutationsanalyse T-Zellklonalitätsanalyse (TCRG und TCRB) B-Zellklonalitätsanalyse (IGH, IGL, IGK) + 3 more
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DAkkS D-ML-13278-01-01 Hamburg, DE
Aminosäuren Second Tier Test IVA Screening (C5 -Carnitin Isobaren) 17-α-OH-Progesteron (17-OH-P) Biotinidase + 3 more
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DAkkS D-ML-13278-09-00 Hamburg, DE
5-Fluorouracil-Toxizität (DPYD) Cowden-Syndrom (PTEN) Diffuses Magenkarzinom (CDH1) Hereditärer Brust- und Eierstockkrebs (HBOC), (BRCA1, BRCA2, CH + 3 more
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DAkkS D-ML-13278-03-00 Hamburg, DE
Factor) Treponema pallidum-Antikörper Treponema pallidum (TPHA) Treponema pallidium (VDRL) Escherichia coli Serotyp + 3 more
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DAkkS D-ML-13278-07-00 Hamburg, DE
Cyclosporin A Everolimus FK 506 (Tacrolimus) Sirolimus 6-Methylmercaptopurin + 3 more
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DAkkS D-ML-13278-02-00 Hamburg, DE
Lymphozyten gesamt, absolut Natürliche Killerzellen, T-Lymphozyten Zelltypisierung (B-Lymphozyten CD57-positive NK-Zellen CD4+ Helfer-Lymphozyten + 3 more
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DAkkS D-ML-13060-06-00 Heidelberg, DE
TSH 17-Hydroxyprogesteron IRT PAP GALT + 3 more
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DAkkS D-ML-13060-04-00 Heidelberg, DE
Zellzahlbestimmung, CD3+, CD4+, CD8+, CD fixpunktzellen Phänotypisierung von Leukozyten C3d Faktor H + 3 more
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DAkkS D-ML-13060-03-00 Heidelberg, DE
Fragiles X-Syndrom, primäre Tremor-Ataxie-Syndrom (FMR1 Parietalzellen/Magen) Glutarazidurie Typ 1 (GCDH -Gen) Dehydrogenase-Mangel (ACADM + 3 more
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DAkkS D-ML-13060-01-00 Heidelberg, DE
Acetominophen Albumin Alkohol ALP Alpha 2-Antiplasmin + 3 more
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DAkkS D-ML-13060-09-00 Heidelberg, DE
Salmonella spp. Shigella spp. Staphylococcus spp. Yersinia spp. Actinomyces spp. + 3 more
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DAkkS D-ML-13144-05-00 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-ML-13144-04-00 Jena, DE
Cryptococcus neoformans, Antikörper Pneumokokken Salmonellen Shigella spp. Staphylococcus aureus + 3 more
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DAkkS D-ML-13144-06-00 Jena, DE
AB0-System A-Untergruppe Rhesusfaktor Antigen-D im indirekten Direkter Coombstest + 3 more
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DAkkS D-ML-13144-07-01 Jena, DE
Impedanzaggregometrie (Induktoren: ADP, TRAP, Arachidonsäure, RIPA-Test Thrombozytenfunktionstest Organische Säuren + 3 more
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DAkkS D-ML-13253-04-00 Köln, DE
Liste aller Untersuchungsverfahren Webpräsenz des Medizinischen Laboratoriu Adrenalin Dopamin Noradrenalin + 3 more
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DAkkS D-ML-13253-03-01 Köln, DE
Cryptococcus-neoformans-Antigen Plasmodium spp. Aerobe und fakultativ anaerobe aerob wachsende Bakterien schnellwachsende Bakterien + 3 more
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DAkkS D-ML-13253-02-00 Köln, DE
Toxoplasma gondii IgG-Antikörper Toxoplasma gondii IgM-Antikörper Treponema pallidum (Syphilis) Thrombozytäre Antikörper Hanta Puumala IgM Antikörper + 3 more
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DAkkS D-ML-13253-07-00 Köln, DE
B-Zellzahl (Immunstatus T-Non-Hodgkin-Lymphome Akute myeloische Leukämie Akute lymphatische Leukämie Multiples Myelom (Plasmazellen) + 3 more
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DAkkS D-ML-13253-01-00 Köln, DE
Treponema pallidum (Lues-AK) HIV -AK HCV-AK HBs-AG HBc-Ak + 3 more
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DAkkS D-ML-13253-06-00 Köln, DE
Familiärer Brust- und Eierstockkrebs (TruRiskTM-PANEL ; folgende Gene werden ausgewertet und befundet: ATM, BARD1, BRCA1, BRCA2, BRIP1,CDH1, CH komplette Genanalyse, Prädiktive + 3 more
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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

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