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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angeborener Chromosomensatz 22q11.2-Mikrodeletionssyndrom (22q11.2) Kopienzahlveränderungen (Regionen laut MLPA-Kit) + 3 more
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Masse oder Konventioneller Wägewert/ Massenormale* Massenormale* > 100 g + 3 more
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DAkkS D-K-18080-01-00 Friedrichshafen, DE
Parallelendmaße 0,5 mm DIN EN ISO 3650:1999 Parallelendmaße * 0,5 mm Parallelendmaße Parallelendmaße > 100 mm + 3 more
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ZwickRoell

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Absolutdruck p * Kraftmesseinrichtungen von Werkstoffprüfmaschinen Acoustics — tonality assessment (DIN 456 Auflagekraft von Fallmassen + 3 more
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HbA1c Basophile Granulozyten Eosinophile Granulozyten Erythrozyten Hämoglobin + 3 more
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DAkkS D-ML-20700-01-00 Hamburg, DE
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DAkkS D-PL-17580-01-00 Reppenstedt, DE
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bactologicum

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DAkkS D-PL-22114-01-01 Hamburg, DE
DIN EN 1040 DIN EN 1275 2006-03 IEC 60127-6 DIN EN 12791 2018-01 DIN EN 13624 2022-08 + 3 more
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DAkkS D-ML-13188-01-01 Limburg a. d. Lahn- Eschhofen, DE
Lysozym = Sexualhormon bindendes Prolaktin Freies Thyroxin 4 (FT4) Beta-Defensin 2 + 3 more
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DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 61400-11
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ISO 7637-1 ISO 7637-2 ISO 7637-3: 2016 ISO 10605 ISO 11452-2: 2019 + 3 more
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dEnergy

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ISO 9613-02
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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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