ISO 3740

Sound power level determination — general measurement guidelines

ISO 3740 provides overarching principles and guidelines for selecting appropriate methods to determine sound power levels of noise sources across diverse industrial and consumer applications. It establishes the framework for choosing between precision, engineering, and survey methods based on application requirements and environmental conditions. Sound power determination is essential for manufacturers complying with noise emission directives, environmental impact assessments, and product labeling regulations across the EU. ISO 17025 accreditation ensures laboratories apply correct methodologies, maintain calibrated instrumentation, and report results with documented uncertainty traceable to primary standards.

What it measures

  • Sound power level (Lw) in decibels
  • Frequency-weighted sound power (A-weighted)
  • Octave or one-third-octave band sound power
  • Sound energy levels
  • Noise source classification and categorization
🇩🇪 DIN EN ISO 3743-1 🇬🇧 BS EN ISO 3743-1 🇫🇷 NF EN ISO 3743-1 🇮🇹 UNI EN ISO 3743-1 🇪🇸 UNE EN ISO 3743-1 🇳🇱 NEN EN ISO 3743-1 🇩🇪 DIN EN ISO 3744 🇬🇧 BS EN ISO 3744 🇫🇷 NF EN ISO 3744 🇮🇹 UNI EN ISO 3744 🇪🇸 UNE EN ISO 3744 🇳🇱 NEN EN ISO 3744
1,868 Accredited labs
20 Countries

Showing 751–775 of 906 labs

DAkkS D-ML-13278-07-00 Hamburg, DE
Cyclosporin A Everolimus FK 506 (Tacrolimus) Sirolimus 6-Methylmercaptopurin + 3 more
View Profile
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
View Profile
DAkkS D-ML-13060-06-00 Heidelberg, DE
TSH 17-Hydroxyprogesteron IRT PAP GALT + 3 more
View Profile
DAkkS D-ML-13060-04-00 Heidelberg, DE
Zellzahlbestimmung, CD3+, CD4+, CD8+, CD fixpunktzellen Phänotypisierung von Leukozyten C3d Faktor H + 3 more
View Profile
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
View Profile
DAkkS D-ML-13060-01-00 Heidelberg, DE
Acetominophen Albumin Alkohol ALP Alpha 2-Antiplasmin + 3 more
View Profile
DAkkS D-ML-13060-09-00 Heidelberg, DE
Salmonella spp. Shigella spp. Staphylococcus spp. Yersinia spp. Actinomyces spp. + 3 more
View Profile
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
View Profile
DAkkS D-ML-13144-04-00 Jena, DE
Cryptococcus neoformans, Antikörper Pneumokokken Salmonellen Shigella spp. Staphylococcus aureus + 3 more
View Profile
DAkkS D-ML-13144-06-00 Jena, DE
AB0-System A-Untergruppe Rhesusfaktor Antigen-D im indirekten Direkter Coombstest + 3 more
View Profile
DAkkS D-ML-13144-07-01 Jena, DE
Impedanzaggregometrie (Induktoren: ADP, TRAP, Arachidonsäure, RIPA-Test Thrombozytenfunktionstest Organische Säuren + 3 more
View Profile
DAkkS D-ML-13253-04-00 Köln, DE
Liste aller Untersuchungsverfahren Webpräsenz des Medizinischen Laboratoriu Adrenalin Dopamin Noradrenalin + 3 more
View Profile
DAkkS D-ML-13253-03-01 Köln, DE
Cryptococcus-neoformans-Antigen Plasmodium spp. Aerobe und fakultativ anaerobe aerob wachsende Bakterien schnellwachsende Bakterien + 3 more
View Profile
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
View Profile
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
View Profile
DAkkS D-ML-13253-01-00 Köln, DE
Treponema pallidum (Lues-AK) HIV -AK HCV-AK HBs-AG HBc-Ak + 3 more
View Profile
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
View Profile
DAkkS D-ML-13195-02-00 Leipzig, DE
HLA-B27 auf T-Zellen Lymphozyten Subpopulationen Intrazellulärer Zytokine Leukozytenadhäsionsmoleküle Oxidativer Burst der Granulozyten + 3 more
View Profile
DAkkS D-ML-13195-05-00 Leipzig, DE
17-Hydroxyprogesteron lmmunreaktives Trypsin MUKO-PAP Thyreotropin (TSH) Biotinidase + 3 more
View Profile
DAkkS D-ML-13195-08-00 Leipzig, DE
Ovarialkarzinom (ATM, BRCA1, BRCA2, BRIP RAD51C; RAD51D; TP53) Cystische Fibrose Panel (CFTR) Cystische Fibrose gezielt + 2 more
View Profile
DAkkS D-ML-13195-06-00 Leipzig, DE
AB0-System Rhesus-Merkmal D Rhesus-Untergruppe Blutgruppe (Kell-System) Blutgruppe (Kidd-System) + 3 more
View Profile
DAkkS D-ML-13264-01-00 Magdeburg, DE
CD34-Zellzahl und Vitalitätsbestimmung Leukozyten, Erythrozyten Lymphozyten Subpopulationen Untersuchung auf AML + 3 more
View Profile
DAkkS D-ML-13264-04-00 Magdeburg, DE
Mukoviszidose Hauptmutationen (N1303K, F508del, R553*, 2143delT, 2184delA, 3272-26A>G, G85E, 62 Alzheimer'sche Erkrankung: APOE Allel), APP (Exon 16 und 17) + 3 more
View Profile
DAkkS D-ML-13264-03-01 Magdeburg, DE
HbA1c CA 125 AMH Albumin Aldosteron + 3 more
View Profile
DAkkS D-ML-13264-02-00 Magdeburg, DE
Anti-Staphylolysin des Staphylococcus aureus Salmonella spp. Treponema pallidum Yersinia spp. + 3 more
View Profile

No matching labs found.

Industries

Machinery and equipment manufacturing HVAC and ventilation systems Power generation equipment Construction and demolition equipment Consumer appliance manufacturers

Related Standards

  • ISO 3743-1 Acoustics — Determination of sound power levels of noise sources — Part 1: Reverberation room method
  • ISO 3744 Acoustics — Determination of sound power levels of noise sources — Engineering method using an enveloping surface
  • ISO 3745 Acoustics — Determination of sound power levels of noise sources — Precision method using an enveloping surface

Other Test Methods

0 labs selected
Compare