ISO 3743-1

Sound power โ€” 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
๐Ÿ‡ฉ๐Ÿ‡ช DIN EN ISO 3740 ๐Ÿ‡ฌ๐Ÿ‡ง BS EN ISO 3740 ๐Ÿ‡ซ๐Ÿ‡ท NF EN ISO 3740 ๐Ÿ‡ฎ๐Ÿ‡น UNI EN ISO 3740 ๐Ÿ‡ช๐Ÿ‡ธ UNE EN ISO 3740 ๐Ÿ‡ณ๐Ÿ‡ฑ NEN EN ISO 3740 ๐Ÿ‡ฉ๐Ÿ‡ช DIN EN ISO 3744 ๐Ÿ‡ฌ๐Ÿ‡ง BS EN ISO 3744 ๐Ÿ‡ซ๐Ÿ‡ท NF EN ISO 3744 ๐Ÿ‡ฎ๐Ÿ‡น UNI EN ISO 3744 ๐Ÿ‡ช๐Ÿ‡ธ UNE EN ISO 3744 ๐Ÿ‡ณ๐Ÿ‡ฑ NEN EN ISO 3744
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ACCREDIA 01577 Scandicci, IT
ISO 10195 ISO 17704 BS EN ISO 14362-1 ISO 14184-1 ISO 4045 + 3 more
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accordance with BS EN ISO 5349-1 ISO 5667-5 UNI 10500 DIN EN ISO 10523 DIN EN 12341 + 3 more
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UNI EN 17702-2 DIN EN 15476 ISO 14820-2 NF EN 13520 ISO 17704 EN 17703 + 2 more
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DIN EN 62053-23: 2017-09 DIN EN ISO 11816-1 IEC 62109-1 IEC 60598-2-2 DIN EN 62053-24 + 3 more
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DIN EN ISO 10705-2 ISO 11731 DIN EN 15634-1 ISO 15705 EPA 353.2 1993 + 3 more
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ACCREDIA 02189 Catania, IT
ETSI EN 319 412 ETSI EN 319 401 ETSI EN 319 411-2 ETSI EN 319 411-1
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ACCREDIA 01854 San Giuliano Milanese, IT
DIN EN 14019 EN ISO 1716 IEC 60512-15-2 BS EN ISO 1716:2002 DIN EN 1026 + 3 more
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DIN EN 60068-2-30 IEC 62080 IEC 61000-6-1 IEC 61000-6-2: 2005 DIN EN 61010-1 + 3 more
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EN 14304:2009+A1:2013 EN 14305:2009+A1:2013 DIN EN ISO 12623 DIN EN 1873 DIN EN 14963 + 3 more
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DIN EN ISO 18203 ASTM B557-15 UNI 1567 ISO 15874 DIN EN ISO 10140-1 + 3 more
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DIN EN 15634-1 DIN EN ISO 15587-1 NF EN ISO-15587-2 ISO 14189 EPA 5030 + 3 more
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ACCREDIA 00333 San Lazzaro di Savena, IT
DIN EN ISO 11200 BS EN 15662 AOAC 995.10 1999
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ACCREDIA 00065 Torino, IT
AOAC 985.29 1986 AOAC 2012.01 2016 ISO 1871 ISO 11443 ISO 937 + 3 more
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ACCREDIA 01258 Lequile, IT
DIN EN 12457-2 DIN EN 15634-1 DIN EN 13039 DIN EN ISO 10304-1 UNI 10802 + 3 more
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ACCREDIA 00086 Prato, IT
IEC 60695-2-11 IEC 60332-2-2:2004 DIN EN ISO 12952-2 DIN EN 60754-2 DIN EN ISO 12952-1 + 3 more
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ACCREDIA 01347 Molfetta, IT
DIN EN 13725:2003-07 und Berichtigung
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ACCREDIA 01448 Udine, IT
DIN EN 16841-1 UNI 7133-3 DIN EN 13725:2003-07 und Berichtigung
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DIN EN 13520 DIN EN 1010-5 DIN EN 1570-1 DIN EN ISO 17228 DIN EN ISO 11640
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ISO 12846 ISO 11348-3 DIN EN 12457-2 ISO 9377-2 ISO 19250 + 3 more
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UNI 13649 EPA 6010 DIN EN 12880 DIN EN 13284-1 UNI 9432 + 3 more
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ACCREDIA 01130 Trento, IT
DIN EN 13180 ISO 11357-1 DIN EN IEC 62631-3-1 DIN EN IEC 62631-3-2 DIN EN IEC 60068-2-11 + 3 more
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DIN EN ISO 12945-2 DIN EN ISO 5403-1 DIN EN ISO 2060 DIN EN ISO 13937-1 DIN EN ISO 11642 + 3 more
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ASTM B212-21 ASTM E1019-24 ASTM B527-24 BS EN ISO 3923-1 ASTM B417-22 + 3 more
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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 โ€” Determination of sound power levels of noise sources โ€” General guidelines
  • ISO 3744 Acoustics โ€” Determination of sound power levels of noise sources โ€” Engineering method using an enveloping surface
  • ISO 354 Acoustics โ€” Measurement of sound absorption coefficient in a reverberation room

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