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 51–75 of 906 labs

Bioscientia Institut für Medizinische Diagnostik GmbH Bioscientia MVZ Freiburg

Active
DAkkS D-ML-13452-10-00 Freiburg, DE
Okkultes Blut Großes Blutbild Kleines Blutbild Retikulozyten Thrombozyten + 3 more
View Profile

Bioscientia Institut für Medizinische Diagnostik GmbH Bioscientia MVZ Ingelheim

Active
DAkkS D-ML-13452-01-01 Ingelheim, DE
2C-B 2C-I 3-Hydroxy-Bromazepam 5-Hydroxyindolessigsäure 6-Acetylcodein + 3 more
View Profile

Bioscientia Institut für Medizinische Diagnostik GmbH Bioscientia MVZ Jena

Active
DAkkS D-ML-13452-05-00 Jena, DE
Zelldifferenzierung Erythrozyten Großes Blutbild Hämoglobin Kleines Blutbild + 3 more
View Profile

Bioscientia Institut für Medizinische Diagnostik GmbH Bioscientia MVZ Mainz

Active
DAkkS D-ML-13452-07-00 Mainz, DE
Hämoglobin (immunologisch) CA 125 CA 15-3 CA 19-9 CA 72-4 + 3 more
View Profile

Bioscientia Institut für Medizinische Diagnostik GmbH Bioscientia MVZ Nordrhein

Active
DAkkS D-ML-13452-06-00 Moers, DE
Hämoglobin Natriumchlorid Kalium Natrium Eiweißelektrophorese: Albumin, Alpha-1-G + 3 more
View Profile

Bioscientia MVZ Labor Karlsruhe

Active
DAkkS D-ML-13322-01-00 Karlsruhe, DE
10-OH-Carbazepin 11-Deoxycortisol 17-OH-Progesteron 21-Deoxycortisol 25-OH Vitamin D2 + 3 more
View Profile

Bioscientia MVZ Labor Mittelhessen

Active
DAkkS D-ML-19774-01-01 Gießen, DE
Thrombozytenfunktion 5-Hydroxyindolessigsäure Adrenalin Amiodaron, Desmethylamiodaron Carbohydrate-deficient + 3 more
View Profile

Bioscientia MVZ Labor Saar

Active
DAkkS D-ML-13031-01-01 St. Ingbert, DE
Lamotrigin Metanephrine, Normetanephrine Erythrozyten Aripiprazol Lymphozyten + 3 more
View Profile

Bizerba SE &

Active
DAkkS D-PL-15018-01-00 Balingen, DE
IEC 61000-4-2: 2008 IEC 61000-4-3: 2006 IEC 61000-4-4: 2012 IEC 61000-4-5: 2005 IEC 61000-4-6: 2013 + 3 more
View Profile

Black Forest Testlab

Active
DAkkS D-PL-22936-01-01 Löffingen, DE
DIN EN 61000-3 IEC 61000-3-2: 2014 IEC 61000-3-3 IEC 61000-3-11: 2017 IEC 61000-3-12: 2011 + 3 more
View Profile

Blower Door

Active
DAkkS D-K-19788-01-00 Springe-Eldagsen, DE
Positiver und negativer verwendete Abkürzungen: DKD-R
View Profile

Bremer Umweltinstitut Gesellschaft für Schadstoffanalytik und Begutachtung

Active
DAkkS D-PL-18812-01-02 Bremen, DE
DIN EN ISO 2418 DIN EN 61340-4-4 DIN CEN ISO/TS 16179 DIN EN ISO 14362-1 DIN EN ISO 14362-3 + 3 more
View Profile

Bundesamt für Seeschifffahrt und Hydrographie

Active
DAkkS D-PL-12084-01-00 Hamburg, DE
IEC 60945 IEC 61162-1 IEC 61162-2 IEC 61162-450 IEC 61162-460 + 3 more
View Profile

Bundesamt für Strahlenschutz Radon-Kalibrierlaboratorium

Active
DAkkS D-K-15063-01-00 Berlin, DE
Radioaktivität 50 Bq/m³ Radon-222- 100 Bq/m³ tration in Luft 200 Bq/m³ + 3 more
View Profile

Bundesanstalt für Materialforschung und -prüfung (BAM) Abteilung 7 / Bauwerkssicherheit

Active
DAkkS D-PL-11075-01-01 Berlin, DE
DIN EN ISO 2808 DIN EN ISO 3219-2 DIN EN ISO 3838 DIN EN 933-1 DIN EN 933-4 + 3 more
View Profile

Bundesanstalt für Materialforschung und -prüfung (BAM) Fachbereich 8.1; Sensorik, mess- und prüftechnische Verfahren

Active
DAkkS D-K-11075-08-00 Berlin, DE
Conformity assessment — requirements for Railway composite brake blocks — require 0,2 kN 0,4 kN 100 kN + 3 more
View Profile

Bundesministerium der Verteidigung Bundeswehrkrankenhaus Berlin Abteilung XVI Laboratoriumsmedizin

Active
DAkkS D-ML-13381-01-01 Berlin, DE
NRBC-Normoblasten Anteil unreifer Retikulozyten Erythrozyten DELTA-He Leukozyten + 3 more
View Profile

Bundeswehrkrankenhaus Berlin Abteilung XVI Laboratoriumsmedizin

Active
DAkkS D-ML-13381-01-00 Berlin, DE
Blutungszeit PFA ADP Blutungszeit PFA EPI PFA-P2Y Erythrozyten Hämatokrit + 3 more
View Profile

Bundeswehrkrankenhaus Berlin Abteilung XXI - Klinische Mikrobiologie & Krankenhaushygiene

Active
DAkkS D-ML-13381-02-00 Berlin, DE
Leukozyten Enteroaggregative E. coli Legionellen Staphylokokkus aureus Salmonellen + 3 more
View Profile

Bureau Veritas Consumer Products Services Germany

Active
DAkkS D-PL-12024-03-02 Türkheim, DE
IEC 61000-4-2: 2008 VDE 0847-4-2 IEC 61000-4-3: 2006 VDE 0847-4-3 IEC 61000-4-4: 2012 + 3 more
View Profile

C-TEC Systemtechnik und Serviceleistung für die Werkstoffprüfung

Active
DAkkS D-K-20476-01-01 Dortmund, DE
/ Messgeräte Radiometrie 100 µW/cm² stärkemessgeräte UV-A 365nm Linearität der + 3 more
View Profile

C. Grünewälder Waagentechnik CalGroup

Active
DAkkS D-K-20113-01-00 Wuppertal, DE
Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO Radiated emissions (CISPR 32) verwendete Abkürzungen:
View Profile

CAL

Active
DAkkS D-PL-14532-01-02 Darmstadt, DE
DIN 38402-A 11 DIN 38402-A 12 DIN 38402-A 13 DIN ISO 5667-5 (A 14) DIN EN ISO 5667-6 (A 15) + 3 more
View Profile

CARTESY

Active
DAkkS D-K-22378-01-01 Mühldorf a. Inn, DE
Tensile testing of metallic materials (I Vickers hardness test (ISO 6507) Kraft Railway vehicles — specific test require Railway — traction effort and braking fo + 3 more
View Profile

CERTIFER Deutschland GmbH CERTIFER Prüfstelle für Schienenfahrzeuge

Active
DAkkS D-PL-11312-01-00 Nürnberg, DE
DIN EN 16334 EN 50128 EN 50129 DIN EN 50215 EN 50657 + 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