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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Industrieanlagen- Betriebsgesellschaft mit beschränkter Haftung Kalibrierlabor

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DIN EN ISO 9614-3 DIN EN ISO 11200 DIN EN ISO 11202 DIN EN ISO 11203 DIN EN ISO 11205 + 3 more
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Infraserv Höchst Segment Site Services

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DAkkS D-PL-14332-01-01 Frankfurt am Main, 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
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Ingenieurbüro Kuntzsch

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DAkkS D-PL-11044-01-01 Dresden, DE
IEC 61400-12-1 IEC 61400-50 IEC 61400-50-1 IEC 61400-50-2 ISO 9613-2
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Ingenieurbüro für Akustik Busch

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DAkkS D-PL-20642-01-00 Kronshagen, DE
DIN EN 61400-11 IEC 61400-11 Edition 3.0 IEC 61400-11 Edition 3.1
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DIN 56912 DIN EN 12198-1 DIN EN 12198-2 DIN EN 12198-3 DIN EN 60825-1 + 3 more
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Ingenieurgesellschaft Holzberg und Riehemann

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DAkkS D-PL-17201-01-00 Rheinmünster, DE
ISO 17987-6 ISO 17987-7 ISO 16845
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Taupunkttemperatur Railway braking — urban guided transport Railway vehicle body structural requirem Railway bogies — wheelsets and bogies st Elektrische + 3 more
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Inspectas Compliance

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UKAS 8401 Drighlington, GB
Appendix 5 of HSG 227 (2004))
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Institut Français Textile Habillement – IFTH – Rhône Alpes

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COFRAC 1-0101 Ecully Cedex, FR
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Institut Technique des Gaz et de l'Air - ITGA - Site St Grégoire K

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COFRAC 1-5970 Saint-Gregoire, FR
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Institut Technique des Gaz et de l'Air - ITGA - Site de Brest

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COFRAC 1-6090 Brest, FR
ISO 22262-1 NF X 43-050 NF X 43-269 – NF X43-050 (parties
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Institut Technique des Gaz et de l'Air - ITGA - Site de La Réunion

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COFRAC 1-6585 Sainte Marie, FR
ISO 22262-1 NF X 43-050 NF X 43-269 – NF X43-050 (parties utiles de
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Institut Technique des Gaz et de l'Air - ITGA - Site de Lille

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COFRAC 1-5971 Villeneuve D'Ascq, FR
NF X 43-269 DIN EN ISO 16017-1 NF X 43-007 NF X 46-032 NF X 43-298 + 3 more
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Institut Technique des Gaz et de l'Air - ITGA - Site de Metz

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COFRAC 1-6091 Metz, FR
NF X 43-269 DIN EN ISO 16017-1 NF X 43-007 NF X 43-298 NF X43-050 (parties utiles de + 3 more
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Institut Technique des Gaz et de l'Air - ITGA - Site de Meyreuil

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COFRAC 1-1029 Meyreuil, FR
NF X 43-269 DIN EN ISO 16017-1 NF X 43-298 NF X 46-032 ISO 22262-1 + 3 more
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Institut Technique des Gaz et de l'Air - ITGA - Site de Mérignac

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COFRAC 1-5968 Merignac, FR
NF X 43-269 DIN EN ISO 16017-1 NF X43-269 – Annexe NF X 43-007 NF X 43-298 + 3 more
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Institut Technique des Gaz et de l'Air - ITGA - Site de Saint Etienne

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COFRAC 1-1761 Saint Etienne, FR
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Institut Technique des Gaz et de l'Air - ITGA - Site de Saint Grégoire

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COFRAC 1-5967 Saint-Gregoire Cedex, FR
NF X 43-269 EN 13087-2 DIN EN ISO 16017-1 NF X 43-007 DIN EN ISO 16017-2 + 3 more
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Institut für Hygiene und Umwelt

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DAkkS D-PL-14095-03-02 Hamburg, DE
DIN 38402-A 12 DIN ISO 5667-5 (A 14) DIN EN ISO 5667-6 (A 15) DIN EN ISO 19458 (K 19) DIN 19643-1 + 3 more
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Institut für Klinische Transfusionsmedizin und Immungenetik Ulm gemeinnützige

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Institut für Solarenergieforschung GmbH ISFH Calibration and Test Center (CalTeC)

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Institut für Umwelt & Energie, Technik & Analytik e.V. (IUTA)

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DAkkS D-PL-19759-01-05 Duisburg, DE
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Institute for International Product Safety

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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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