ISO 3743-1

Sound power — reverberation field engineering method

ISO 3743-1 specifies the reverberation room method for determining sound power levels of noise sources, suitable for smaller sources or laboratory environments where sound pressure is measured in a reverberant acoustic field. The method is applicable across a wide frequency range and is commonly used for equipment testing, product compliance assessment, and environmental noise impact studies. This engineering-level method balances accuracy with practical testing constraints and is widely required for EU noise directive compliance and product CE marking. Accreditation demonstrates laboratory control of environmental conditions, proper instrumentation calibration, and competence in complex acoustic data analysis.

What it measures

  • Sound power level (Lw) using sound pressure in reverberation room
  • A-weighted and frequency-weighted sound power
  • Octave band sound power levels (31.5 Hz to 8 kHz)
  • Sound power uncertainty and test environment correction
  • Directional sound power characteristics
🇩🇪 DIN EN ISO 3740 🇬🇧 BS EN ISO 3740 🇫🇷 NF EN ISO 3740 🇮🇹 UNI EN ISO 3740 🇪🇸 UNE EN ISO 3740 🇳🇱 NEN EN ISO 3740 🇩🇪 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 576–600 of 906 labs

SKZ - Testing

Active
DAkkS D-PL-19033-01-01 Würzburg, DE
Bauart wie GR 1482 DIN ISO 48-4 DIN ISO 7619-2 DIN EN ISO 868 DIN EN ISO 2039-1 + 3 more
View Profile

SLG Prüf- und Zertifizierungs

Active
DAkkS D-PL-15110-01-02 Hartmannsdorf, DE
IEC 61000-4-2: 2008 IEC 61000-4-3: 2006 DIN EN IEC 61000 IEC 61000-4-4: 2012 IEC 61000-4-5: 2005 + 3 more
View Profile

SLM - Speziallabor für angewandte Mikrobiologie

Active
DAkkS D-PL-18176-01-02 Berlin, DE
DIN EN ISO 11737-2 DIN 58953-6 DIN 1946-4 DIN EN 13959 DIN EN ISO 8536-4 + 3 more
View Profile

SMA Solar Technology

Active
DAkkS D-PL-12074-01-01 Niestetal, 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

SPEKTRA Schwingungstechnik und Akustik GmbH Dresden

Active
DAkkS D-K-15183-01-02 Dresden, DE
Akustische Messgrößen* Schalldruckpegel (Freifeld), (bezogen au Freifeld-Leerlauf- oder 125 Hz ˃ 250 Hz mit / ohne Windschirm > 8 kHz + 3 more
View Profile

SPS electronic

Active
DAkkS D-K-20497-01-01 Twist, DE
- Gleichspannung Messgeräte 1 mV > 330 mV 3,3 V Messgeräte 0,33 V + 3 more
View Profile

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

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 Dachau GmbH SYNLAB Gauting Zweigniederlassung der SYNLAB MVZ Dachau

Active
DAkkS D-ML-22313-01-00 Gauting, DE
Mycobacterium tuberculosis Komplex Mykobakterien Obligat aerobe Aktinomyceten Interferon-gamma nach + 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 Medizinisches Versorgungszentrum Regensburg

Active
DAkkS D-ML-13014-06-01 Regensburg, DE
HbA1c Erythrozyten Leukozyten Leukozytendifferenzierung Reticulozyten + 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

No matching labs found.

Industries

Power tool and equipment manufacturers Laboratory and medical device makers Small machinery producers Consumer electronics manufacturers Heating and ventilation equipment suppliers

Related Standards

  • ISO 3740 Acoustics — Determination of sound power levels of noise sources — General guidelines
  • ISO 3744 Acoustics — Determination of sound power levels of noise sources — Engineering method using an enveloping surface
  • ISO 354 Acoustics — Measurement of sound absorption coefficient in a reverberation room

Other Test Methods

0 labs selected
Compare