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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Kiwa

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UKAS 2667 Blackwood, GB
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RvA L015 Rijswijk Zh, NL
ISO 2781 ISO 1133-1 ISO 6259-1:2015 ISO 6259-3 ISO 6259-2:1997 + 3 more
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Kiwa Primara

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DAkkS D-PL-12089-01-01 Kaufbeuren, DE
BS 1363 DIN VDE 0620-2 DIN VDE 0620-2-1 ISO 12100: 2010 DIN EN 50124-1 + 3 more
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Klingelnberg

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DAkkS D-K-21339-01-00 Hückeswagen, DE
Verzahnungsmesstechnik Die nachgewiesene Verzahnung und rotationssymmetrische abgedeckten Prüfkörper mit taktiler + 3 more
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DAkkS D-PL-13430-01-00 Köln, DE
DIN EN ISO 11138-3 DIN EN ISO 11138-4 DIN EN 13959 DIN 1946-4 DIN EN ISO 19458 (K 19) + 3 more
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DAkkS D-ML-13430-01-00 Köln, DE
Thrombozytenaggregation Adrenalin, Kollagen, Ristocetin, Arachid Partielle Thromboplastinzeit Fibrinogenaktivität (derived) Lupusantikoagulantien + 3 more
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DAkkS D-ML-19856-01-00 Ingolstadt, DE
Liste aller Untersuchungsverfahren Webpräsenz des Medizinischen Laboratoriu Thrombozytenaggregation Trizyklische Antidepressiva Neuroleptika (Clozapin, Norclozapin, Ola + 3 more
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DAkkS D-ML-13265-01-00 Nürnberg, DE
Antidepressiva 1: Metabolit, Paroxetin, Fluvoxamin Antidepressiva 2: Antiepileptika: Carbazepin, Sultiam, Lamotrigin + 3 more
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DAkkS D-ML-13321-01-01 Wolfsburg, DE
Retikulozyten Differentialblutbild Erythrozytenzahl Erythrozyten-Volumen (MCV) Verteilungsbreite) + 3 more
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DAkkS D-ML-13355-03-00 Stuttgart, DE
Thrombozytenfunktion Antiepileptika: Benzodiazepine, Fentanyl Ethylglucuronid, Ethylsulfat Ciclosporin, Tacrolimus, Everolimus + 3 more
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DAkkS D-ML-13355-04-00 Stuttgart, DE
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DAkkS D-ML-13295-05-00 München, DE
HLA-Antikörpertestung (Detektion) HLA-Klasse I und II HLA-Antikörper (Spezifizierung) HLA-Antikörper Screening HLA-Antikörperdifferenzierung + 3 more
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DAkkS D-ML-13295-04-00 München, DE
Thromboplastinzeit) Thrombozytenfunktion 10-OH-Carbazepin 5-Hydroxyindolessigsäure (5-HIES) + 3 more
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DAkkS D-ML-13295-04-01 München, DE
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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DAkkS D-ML-13295-03-00 München, DE
17-OH-Progesteron ACTH Androstendion Aldosteron Anti-TG Antikörper + 3 more
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DAkkS D-ML-13421-01-00 Ludwigshafen, DE
Liste aller Untersuchungsverfahren Webpräsenz des Medizinischen Laboratoriu CDT Ampicilin Cefepim + 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-15098-01-00 Leonberg, DE
Koordinatenmessgeräte geräte mit einem Messprojektoren einer Raumdiagonalen Messmikroskope ≤ 600 mm verwendete Abkürzungen:
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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
(ein- und mehrgängige zylindrische Außen- und geradlinigen Flanken und symmetrischem Profil sowie positiven Flankenwinkeln) + 3 more
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UKAS 23015 Mansfield, GB
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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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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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