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
1,868 Accredited labs
20 Countries

Showing 901–925 of 1,868 labs

COFRAC 1-0977 Montpellier Cedex 2, FR
DIN EN ISO 13395 DIN EN ISO 7899-1 DIN EN ISO 6888-2 ISO 5815-1 NF T90-015-1 + 3 more
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COFRAC 1-0997 Limoges, FR
ISO 5815-1 EN 13087-2 DIN EN ISO 6579-1 NF U47-108 ISO 15705 + 3 more
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COFRAC 1-1046 Les Ponts De Ce, FR
NF V08-401 DIN EN ISO 6888-2 DIN ISO 16649-2 BS ISO 15214:1998 NF V08-409 + 3 more
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COFRAC 1-1356 Gap Cedex, FR
NF V 04-155 DIN EN ISO 21528-2 DIN ISO 16649-2 DIN EN ISO 6888-2 NF V08-054 + 3 more
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COFRAC 1-1105 Serres-Castet, FR
DIN EN 10002-1 ASTM E8/E 8M ASTM A 370 NF EN ISO 6892-1 (méthodes A1, A2 et DIN EN 2002-001 + 3 more
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COFRAC 1-1021 Saint Beauzire, FR
ISO 14698-1 DIN EN ISO 17141 DIN EN 12469 DIN EN ISO 11138-2 DIN EN ISO 11737-2 + 3 more
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COFRAC 1-6990 La Ciotat, FR
DIN EN 13624 DIN EN 13727 DIN EN ISO 11930 DIN EN 17387 DIN EN ISO 22717 + 3 more
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COFRAC 1-1979 Limoges, FR
NF V 04-407 DIN EN ISO 6888-1 NF V04-403 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 + 3 more
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COFRAC 1-1160 Trinite, FR
NF T 90-412 DIN EN ISO 6888-1 DIN EN ISO 7899-1 DIN EN ISO 21528-2 DIN ISO 16649-2 + 3 more
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COFRAC 1-0714 Sophia Antipolis Cedex, FR
DIN EN ISO 21528-2 DIN EN ISO 6888-2 DIN ISO 16649-2 ISO 5815-1 BS ISO 15214:1998 + 3 more
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COFRAC 1-1173 Lagor, FR
DIN EN 14385 NF U47-002 NF X43-551 ETSI EN 301 489-1 V2.2.3 2019-11 DIN EN ISO 14403-2 + 3 more
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COFRAC 1-1847 Lyon 7Eme, FR
DIN EN 10002-1 BS ISO 9227:2022 DIN EN ISO 643 EN ISO 12624 DIN EN 10045-1 + 3 more
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ENAC LE609 Abegondo, ES
UNE 77324 ISO 23318 UNE 77325 ISO 10390 UNE 77308 + 3 more
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ACCREDIA 00789 Mazzarino, IT
DIN EN 15634-1 DIN EN ISO 15587-1 NF EN ISO-15587-2 ISO 14189 EPA 5030 + 3 more
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ENAC LE390 Madrid, ES
UNE-EN ISO 663 UNE-EN ISO 662 UNE-EN 16328 UNE-EN 16618 UNE-EN 13368-1 + 3 more
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ENAC LC10.102 Burgos, ES
CEM ME-003 EURAMET cg-18 UNE 82503 CEM DI-020 CEM DI-005 + 3 more
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ENAC LE130 Madrid, ES
DIN EN 60335-2-51 DIN EN 60335-2-43 IEC 62054-21 IEC 60335-2-51 DIN EN 60335-2-99 + 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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ENAC LE1892 León, ES
UNE-EN ISO 140-5 UNE-EN ISO 16283-3 UNE-EN ISO 16283-2 UNE-EN ISO 140-7 ISO 2631-2 + 3 more
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ENAC LC10.085 Madrid, ES
UNE-EN 60942 UNE-EN 61672-3 UNE-EN 60804 UNE-EN 60651 UNE-EN 61260-3 + 3 more
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ENAC LE821 Madrid, ES
UNE-EN ISO 16283-1 UNE-EN ISO 16283-2 UNE-EN ISO 16283-3 UNE-EN ISO 140-7 UNE-EN ISO 140-4 + 1 more
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ENAC LE1512 Donostia-San Sebastián, ES
UNE-EN ISO 140-5 UNE-EN ISO 16283-3 UNE-EN ISO 16283-2 UNE-EN ISO 140-7 UNE-EN ISO 16283-1 + 1 more
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ENAC LC10.110 Vilanova i la Geltrú, ES
CEM DI-021 CEM DI-008 EURAMET CG-10 CEM DI-005 EURAMET CG-6 + 2 more
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ENAC LC10.002 Madrid, ES
nach DIN EN ISO 3650:1999 EURAMET CG-6 ISO 5436-1 CEM DI-013 CEM DI-012 + 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 — 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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