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-13014-01-00 Weiden, DE
Aceton, Isopropanol, Methanol Ethanol (Morphin, 6-Monoacetyl-morphin, Codein u Quantitative Bestätigungsanalyse Barbiturate (qualitative + 3 more
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HbA1c Mittlere Blutglucose Aktivitätskonzentration Blutsenkung % Hyperchrome Erythrozyten + 3 more
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DAkkS D-ML-13014-03-01 Jena, DE
5-Fluorouracil Unverträglichkeit: DPD Mutationen Exon 14 c.1905+1 G>A rs3918290, Exon 11 c.1236G>A rs56038477, Exon 13 c.1679T>G rs55886062, Exon 22 c.2846A>T + 3 more
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DAkkS D-K-15008-01-01 Gladbeck, DE
Parallelendmaße 0,5 mm DIN EN ISO 3650:1999 Parallelendmaße aus Wolframkarbid nach Parallelendmaße aus 0,5 mm + 3 more
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DAkkS D-PL-23049-01-02 Boppard-Buchholz, DE
DIN EN ISO 16283-1 DIN EN ISO 16283-3 DIN EN ISO 16032 DIN EN ISO 10052 DIN EN ISO 3382-3 + 3 more
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DAkkS D-K-15216-01-00 Langenfeld, DE
Kraft (WPM) Werkstoffprüfmaschinen Acoustics — tonality assessment (DIN 456 Länge (WPM) messeinrichtungen von + 3 more
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DAkkS D-PL-17145-01-00 Dogern, DE
DIN ISO 14573 ISO 21527-1 DIN EN 12102-2 DIN EN 1335-1 DIN EN 1728 + 3 more
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DAkkS D-PL-11327-03-00 Hamburg, DE
DIN EN ISO 12185 ASTM D 4052 DIN EN ISO 3405 DIN EN 13016-1 DIN EN 13016-2 + 3 more
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DAkkS D-PL-21993-01-00 Lindau (Bodensee), DE
DIN EN 61800-5-1: 2017
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DAkkS D-PL-11222-01-01 Oststeinbek, DE
ISO 37 ISO 8513 DIN EN 1393 ISO 21527-2 DIN EN ISO 527-4 + 3 more
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DAkkS D-K-11055-06-02 Fürth, DE
Thermodynamische Messgrößen Temperaturmessgrößen - Direktanzeigende Thermometer Railway brake handbooks (UIC 547) - Thermopaare, Thermoelemente + 3 more
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DAkkS D-K-11055-10-01 Amberg, DE
Gleichspannung / Sound power — survey method (ISO 3746) Quellen Wechselspannung / Gleichstromstärke / + 3 more
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DAkkS D-PL-21472-02-00 Erlangen, DE
DIN 45641 DIN 45630-1 DIN 45635-1 DIN 45635-14 DIN ISO 10494 + 3 more
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DAkkS D-PL-22642-01-01 Erlangen, DE
DIN EN 60601-1 IEC 60601-1 DIN EN 60601-1-3 IEC 60601-1-3 DIN EN 60601-2-54 + 3 more
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DAkkS D-K-21044-02-01 Clausthal-Zellerfeld, DE
Sound power — engineering method using a Kalibrierung von 250 N Kraftmessgeräten Kraftaufnehmer und 0,25 kN + 3 more
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DAkkS D-PL-20107-01-01 Sonnenbühl, DE
IEC 61400-1 IEC 61400-12-1 IEC 61400-50 IEC 61400-50-1 IEC 61400-50-2 + 2 more
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DAkkS D-ML-13177-02-00 Bamberg, DE
Verschlußzeit Kollagen/ADP Kollagen/Epinephrin Basophile Granulozyten Eosinophile Granulozyten Erythrozyten + 3 more
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DAkkS D-ML-13180-01-00 Bamberg, DE
Verschlußzeit Kollagen/ADP Kollagen/Epinephrin Basophile Granulozyten Eosinophile Granulozyten Erythrozyten + 3 more
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DAkkS D-PL-13415-02-00 Ulm, DE
DIN EN ISO 9626 ISO 7206-13 ISO 7206-12 ISO 7206-10 ISO 7206-4 + 3 more
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DAkkS D-PL-14420-01-01 Radebeul, DE
DIN 38402-A 13 DIN EN ISO 5667-6 (A 15) DIN EN ISO 5667-1 (A 4) DIN EN ISO 5667-3 (A 21) DIN 38404-C 4 + 3 more
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DAkkS D-K-15137-01-00 Leipzig, DE
Kraft Vibration measuring instruments — requir Sound power — survey method (ISO 3746) 1 kN Railway brake — automatic variable load + 3 more
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DAkkS D-ML-22372-01-00 Passau, DE
Großes Blutbild Kleines Blutbild Erythrozyten Hämoglobin Hämatokrit + 3 more
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DAkkS D-K-11200-01-00 Gosheim, DE
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DAkkS D-K-15212-01-01 Leubingen, DE
Parallelendmaße aus 0,5 mm Parallelendmaße aus Keramik nach 0,5 mm Wolframkarbid nach 0,5 mm DIN EN ISO 3650:1999 + 3 more
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DAkkS D-K-15146-01-01 Schöneck-Kilianstädten, DE
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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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