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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ISO 18164 ISO 28580 ISO 16392 ISO 15222 ISO 13325
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ISO 2631-4 DIN EN 15839 DIN EN 15746-1 DIN EN 15746-2 DIN EN 15746-3 + 3 more
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IEC 61508-1 EN 61508-1: IEC 61508-2 IEC 61508-3 DIN EN 61508-3 + 3 more
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DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN 45680 Beiblatt 1 DIN 45691
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DIN EN ISO 3170 DIN 19698-1 DIN 19698-2 DIN 19698-5 DIN 19698-6 + 3 more
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UL International Germany

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IEC 61851-1: 2010 IEC 61851-23 IEC 62109-1 IEC 62109-2 IEC 61010 + 3 more
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Universität Stuttgart Institut für Gebäudeenergetik, Thermotechnik und Energiespeicherung

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Universität Stuttgart Materialprüfungsanstalt

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Universität Stuttgart Materialprüfungsanstalt Universität Stuttgart

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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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