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 1,726–1,750 of 1,868 labs

DAkkS D-ML-13069-08-00 Kiel, DE
Sprosspilze, Schimmelpilze, Dermatophyte Staphylococcus aureus, MRSA Plasmodien (Malaria) (Plasmodium falciparum/vivax/ovale/malariae Legionella, Antigen + 3 more
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DAkkS D-ML-13130-02-00 Tübingen, DE
Phytansäure Behensäure Lignocerinsäure Cerotinsäure Adrenalin + 3 more
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DAkkS D-ML-13130-04-00 Tübingen, DE
Ataxien (FXN, SCA1, SCA2, SCA3, SCA6, SC Tumor-Prädispositionen: Brust- Hereditäres Magenkarzinom (CDH1) C9orf72 Chorea Huntington (HTT) + 3 more
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DAkkS D-ML-13130-01-00 Tübingen, DE
Urinsediment (Leukozyten) Legionella spp. Lipoid-AK (Treponema pallidum Aktivitätsparameter) Salmonella spp. + 3 more
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DAkkS D-ML-13130-03-01 Tübingen, DE
Herpes-simplex (IgM) Herpes-simplex (IgG) Herpes-simplex 1 (IgG) Herpes-simplex 2 (IgG) Varizella-Zoster-Virus (IgM) + 3 more
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DAkkS D-ML-13130-07-00 Tübingen, DE
Ataxien (FXN, SCA1, SCA2, SCA3, SCA6, SC Tumor-Prädispositionen: Brust- Hereditäres Magenkarzinom (CDH1) C9orf72 Chorea Huntington (HTT) + 3 more
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DAkkS D-ML-13130-05-00 Tübingen, DE
Basophile Granulozyten Allergenspezifisches IgE Gesamt IgE Tryptase anti-Cardiolipin-IgG + 3 more
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DAkkS D-ML-13294-08-00 Ulm, DE
Aminosäurendiagnostik verschiedene Aminosäuren) Differenzialblutbild Urinbestandteile Zellzählung + 3 more
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DAkkS D-ML-13294-03-01 Ulm, DE
angeborene und erworbene Chromosomenstörungen gezielter Nachweis (sub)mikroskopisch kleiner angeborener oder erworbener + 3 more
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DAkkS D-ML-13294-07-00 Ulm, DE
Treponema pallidum (Cardiolipin Antikörper, Lues-Analytik) Cryptococcus neoformans Meningitiserreger (Streptococcus agalactiae, Haemophilus + 3 more
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DAkkS D-ML-13294-06-00 Ulm, DE
Allergenspezifisches IgE ECP (Eosinophiles cationisches (ECP) Mastzell Tryptase spezifisches IgG + 3 more
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DAkkS D-ML-13294-02-00 Ulm, DE
ADP Arachidonsäure Kollagen/Epinephrin Ristocetin Expression aktivierungsabhängiger + 3 more
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DAkkS D-ML-13294-01-01 Ulm, DE
HbA1c Aldosteron Cortisol APCR- Resistenz Cardiolipin-AK IgG + 3 more
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DAkkS D-ML-13220-02-00 Homburg, DE
freies Hämoglobin Erythrozyten Hämatokrit Hämoglobin Kleines Differential-Blutbild + 3 more
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DAkkS D-ML-13220-01-01 Homburg, DE
Urinsediment Lamotrigin HbA1c Erythrozyten Aripiprazol + 3 more
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DAkkS D-ML-13155-04-00 Greifswald, DE
Familiäre Adenomatöse Polyposis Syndrome (APC, MUTYH) STK11, SMAD4 ), TruRisk® -Panel [SNV, CN Familiäre Polyposis-Syndrome [FAP] (APC, MUTYH) + 3 more
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DAkkS D-ML-13161-02-00 Göttingen, DE
angeborener Chromosomensatz Molybdän-Cofaktor Defizienz (MOCS1, MOCS2) Fragiles X-Syndrom: FMR1 Spinocerebellare Ataxie (SCA) + 3 more
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DAkkS D-ML-13161-01-00 Göttingen, DE
Thrombozytenaggregation Born Verschlußzeit Kollagen/ADP Verschlußzeit Kollagen/Adrenalin 6-Methyl-Mercaptopurinnukleotide + 3 more
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DAkkS D-ML-13161-05-00 Göttingen, DE
Thrombozytenaggregation Born Verschlußzeit Kollagen/ADP Verschlußzeit Kollagen/Adrenalin 6-Methyl-Mercaptopurinnukleotide + 3 more
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DAkkS D-ML-13161-06-00 Göttingen, DE
angeborener Chromosomensatz Molybdän-Cofaktor Defizienz (MOCS1, MOCS2) Fragiles X-Syndrom: FMR1 Spinocerebellare Ataxie (SCA) + 3 more
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DAkkS D-ML-13193-04-00 Rostock, DE
alpha-Aminobuttersäure Mianserin Arginin Asparagin Asparaginsäure + 3 more
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DAkkS D-ML-13193-01-00 Rostock, DE
Candida spp.-Antikörper Cardiolipin-Antikörper Meningitiserreger-Ag (E. coli Staphylococcus aureus Treponema pallidum-Antikörper + 3 more
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DAkkS D-ML-13193-03-01 Rostock, DE
Granulozytäre Antikörper (Screening und Differenzierung) HLA spezifische Antikörper B-Streptokokken (Screening) Ektoparasiten (Differenzierung) + 3 more
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DAkkS D-ML-13258-04-00 Mainz, DE
Anti-Thyreoglobulin-Antikörper [Anti-TG] Anti-Thyreoperoxidase Antikörper [Anti-TPO] Anti-TSH-Rezeptor Antikörper + 3 more
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DAkkS D-ML-13258-01-01 Mainz, DE
angeborener Chromosomensatz Silver-Russell-Syndrom: H19, KCNQ1OT1 MEST Deletion; Angelman-Syndrom + 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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