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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DAkkS D-ML-13295-04-00 München, DE
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Lamotrigin AFP HbA1c CA 125 AMH + 3 more
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Kleines Blutbild Differentialblutbild maschinell C-reaktives Protein (CRP) Differentialblutbild manuell Urinstatus + 3 more
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17-OH-Progesteron ACTH Androstendion Aldosteron Anti-TG Antikörper + 3 more
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Liste aller Untersuchungsverfahren Webpräsenz des Medizinischen Laboratoriu CDT Ampicilin Cefepim + 3 more
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Rhythmusstörungen (ABCC9, AKAP9, ANK2,TT MSH2, MSH6, MUTYH, PMS2, PTEN, RAD51C, R Familiärer Brust- und Eierstockkrebs MSH2, MSH6, EPCAM ); SNV, CNV Birt-Hogg-Dubé-Syndrom (FLCN + 3 more
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DAkkS D-ML-13400-01-00 Groß Grönau, DE
AMA M2-3E IgG Anti-CCP (Cyclische Citrullin Antikörper) IgG Anti-dsDNS-NCX IgG Anti- Transglutaminase + 3 more
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DAkkS D-K-17518-01-01 Remscheid, DE
abweichungen Metrosoft CM und Messvolumen Metrosoft QUARTIS, mit einer Software der Fa. WENZEL Raumdiagonale Metromec Chur, CH von ≤ 4666 mm
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DAkkS D-K-15098-01-01 Leonberg, DE
Software von WENZEL einer Raumdiagonalen Messprojektoren einer Raumdiagonalen Koordinatenmessgeräte geräte mit einem Messmikroskope ≤ 600 mm Auswertesoftware Messvolumen mit + 2 more
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DAkkS D-K-15077-01-00 Aschaffenburg, DE
Parallelendmaße 0,5 mm bis DIN EN ISO 3650:1999 Parallelendmaße aus 0,5 mm bis Keramik oder Wolframkarbid nach + 3 more
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DAkkS D-K-22877-01-01 Eschweiler, DE
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UKAS 23015 Mansfield, GB
and Appendix 3 of HSG 227 (2004)) Appendix 5 of HSG 227 (2004))
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DAkkS D-PL-22819-01-00 Lüdenscheid, DE
DIN 40050-9 IEC 60068-2-2 IEC 60068-2-6 DIN EN IEC 60068-2-13 DIN EN 60068-2-14 + 3 more
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UKAS 7736 Chelmsford, GB
(HSG 248) – 2021 (PCM) based on HSG 248 SAS 02 based on HSG 248
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Kovia

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UKAS 9942 Royal William Yard, GB
Appendix 5 of HSG 227 (2004)) HSG 227 (2004) HSG 264 (2012) and Appendix 3 of
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DAkkS D-ML-13173-01-00 Bad Oeynhausen, DE
Thrombozytenfunktion Amiodaron/Desethylamiodaron Cotinin Cyclosporin A Everolimus + 3 more
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DAkkS D-ML-21357-01-00 Heppenheim, DE
Albumin Alkohol ALP Anti-Faktor Xa (Fragmin) AT3 + 3 more
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DAkkS D-PL-19181-01-00 Winnenden, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 13487 DIN 45635-46 + 2 more
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DAkkS D-K-15009-01-01 Leipzig, DE
Eindringkörper für 75° Sound system equipment — speech transmis Länge der Schnittlinien * Vergrößerungsnormale Abflachung bis 300 + 3 more
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DAkkS D-K-15082-01-00 Hamburg, DE
Durchfluss von Gasen 17 mL/s transferstandards Strömungswiderstand 5 mL/min 15,0 mL/min Laminar Flow Elemente 17 mL/min + 3 more
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DAkkS D-PL-22893-01-00 Rheine, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 61400-11 ISO 9613-2
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DAkkS D-K-17059-02-01 Dresden, DE
Messschieber für Außen-, 0 mm Innen- und Tiefenmaße > 300 mm Tiefenmessschieber 0 mm Höhenmessschieber 0 mm + 3 more
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UKAS 0671 Basildon, GB
(HSG 248) – 2021 (PCM) based on HSG 248 MAAM 05 based on HSG 248 (HSG 264, 2012)
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LABACUSTIC

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ENAC LE1438 Vall d Uixó, 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 LE285 Alacant, ES
UNE-EN ISO 27888 SM 2540 UNE-EN ISO 8467 UNE-EN ISO 7027-1 UNE-EN ISO 10523 + 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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