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
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Bundesamt für Seeschifffahrt und Hydrographie

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Radioaktivität 50 Bq/m³ Radon-222- 100 Bq/m³ tration in Luft 200 Bq/m³ + 3 more
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Bundesanstalt für Materialforschung und -prüfung (BAM) Abteilung 7 / Bauwerkssicherheit

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

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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
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Bundesministerium der Verteidigung Bundeswehrkrankenhaus Berlin Abteilung XVI Laboratoriumsmedizin

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Bureau Veritas Consumer Products Services Germany

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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
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C-TEC Systemtechnik und Serviceleistung für die Werkstoffprüfung

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C. Grünewälder Waagentechnik CalGroup

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CARTESY

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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
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CERTIFER Deutschland GmbH CERTIFER Prüfstelle für Schienenfahrzeuge

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DIN EN 16334 EN 50128 EN 50129 DIN EN 50215 EN 50657 + 3 more
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CETA Testsysteme

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Druck * > –0,12 bar bis negativer und positiver Überdruck p e > –0,01 bar bis > 0,03 bar bis + 3 more
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CEcert

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DAkkS D-PL-12049-01-02 Wismar, DE
IEC 61000-4-2: 2008 EN IEC 61000-4 IEC 61000-4-3: 2006 IEC 61000-4-4: 2012 IEC 61000-4-5: 2005 + 3 more
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COAGUMED Gerinnungszentrum

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COMPRION GmbH Prüf- und Kalibrierlabor

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- Gleichspannung Quellen > 0,10 V > 1 V > 10 V - Gleichstromstärke + 3 more
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CSA Group Bayern

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DAkkS D-PL-12030-01-02 Plattling, DE
DIN EN 55016-2 VDE 0877-16-2-1 VDE 0877-16-2-2 VDE 0877-16-2-3 EN IEC 61000-4 + 3 more
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CTK-Poliklinik

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Carl Zeiss

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DAkkS D-PL-12125-01-01 Oberkochen, DE
DIN EN 60601-1 IEC 60601-1 DIN EN 60601-1-1 IEC 60601-1-1 IEC 80601-2-77 + 3 more
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Carl Zeiss IQS Deutschland

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DAkkS D-K-21703-01-00 Oberkochen, DE
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Carl Zeiss Industrielle Messtechnik

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DAkkS D-K-15007-01-01 Oberkochen, DE
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Carl Zeiss Jena

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DAkkS D-PL-12037-01-02 Jena, DE
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Carl Zeiss Jena GmbH Kompetenzzentrum Qualität/Kalibrierlabor

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DAkkS D-K-12037-01-01 Jena, DE
Parallelendmaße * 0,5 mm DIN EN ISO 3650:1999 Parallelendmaße * 40 mm Parallelendmaße * ≥ 100 mm Strichmaßstäbe 0 mm + 3 more
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CeGaT

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DAkkS D-ML-13206-01-01 Tübingen, DE
angeborener Chromosomensatz (Imbalancen im Genom, (Duplikationen/Del SNRPN-Region 15q11-13 UPD15 (UBE3A) SMN1; Spinale Muskelatrophie + 3 more
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Cenata

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DAkkS D-ML-21205-01-01 Tübingen, DE
Pränatales Screening auf Chromosomenstörungen (Trisomie 21, Trisomie 18, Trisomie 13, X0, XXX, XXY, XYY, XXYY, 22q11 (DiGe
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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

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